HELP MEEEE I DONT UNDERSTAND PLS EXPLAIN

The number of grains on square 59 will be 5.7646075230342 x 10^17grains.

No. of grains on the first square = 1 = 2^0

No. of grains on the second square = 2 = 1*2 = 2¹

No. of grains on the third square = 4 = 2*2 = 2²

No. of grains on the fourth square = 8 = 2*4 = 2³

From the pattern it could be seen that amount of wheat is doubled for every next square

So, the number of grains in the nth square = 2^n-1

Therefore, No. of grains on 59th square

= 2^59 -1 =

= 5.7646075230342 x 10^17

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The probability will be .56, .24,0.06 and .21 respectively in the question.

What is probability?

By simply dividing the favorable number of possibilities by the entire number of possible outcomes, the probability of an occurrence can be determined using the probability formula. Because the favorable number of outcomes can never exceed the entire number of outcomes, the chance of an event occurring might range from 0 to 1.

Presumably, the events are independent.

the probability that they both hit the target :

p(both hits) = .8*.7 = .56.

Jiri hits but Benita misses:

P(Benita hits &Jiri misses) = P(Benita hits)×P(Jiri misses) = .8 * .3= .24

they both miss the target:

p(both misses) = .2*.3 = 0.06

Benita hits but Jiri misses:

P(Benita misses &Jiri hits) = .2*.7 = .21

Hence the probability will be .56, .24,0.06 and .21 respectively in the question.

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Answer: Yes

Step-by-step explanation: To show that the percentage has increased we would need to prove that 416/1015 with a 99% level of confidence or a 1% margin of error to do this we divide 416 by 1015

This equals 0.40985221674

Which can be rounded to 0.41 or 41% since there is a one percent margin of  error we can assume that this is enough evidence, because if 1% of the poll's recipients mistakenly voted for a option they did not really think was true it would not be enough to change 41% to 33%

Hope this helps!

a. [tex]a^{3}[/tex].

b. [tex]\frac{1}{2c^{6}}[/tex].

[tex]\frac{a^{4} }{a}[/tex]

[tex]\frac{a^{4-1} }{a^{1-1} }=\\ \\\frac{a^{3} }{a^{0} }=\\\\ \frac{a^{3} }{1 }=\\ \\a^{3}[/tex]

[tex]a^{3}[/tex]

----------------------------------------------------------------------------------------------------------

[tex]\frac{2c^{-4} }{c^{2}}[/tex]

[tex]\frac{1}{c^{2}*2c^{4} }[/tex]

[tex]\frac{1}{2c^{6}}[/tex]

Answer:

81,-247, 729

Step-by-step explanation:

each time its multiplying it by -3

so -27x-3=81

Answer: 729

Step-by-step explanation: The thing that happens every time is -3 is multiplied: 1, -3, 9, -27,  81, -243, 729

hope this helps!

please give brainliest!

The value of x is 22.37 and y is 20

What is Interior angle?

An angle of a polygon is formed by two sides of the polygon that share an endpoint. For a simple (non-self-intersecting) polygon, regardless of whether it is convex or non-convex, this angle is called an interior angle (or internal angle) if a point within the angle is in the interior of the polygon.

What is Exterior angle?

An exterior angle (also called an external angle or turning angle) is an angle formed by one side of a simple polygon and a line extended from an adjacent side.

We know, the sum of interior angle is 180 degree

The given interior angles is ,

3y + 5 and 5y + 15

So, equate to 180°

3y + 5 + 5y + 15 = 180°

Solve for 'y'

8y + 20 = 180

4(2y + 5) = 180

2y + 5 = 45

2y = 45 - 5

2y = 40

y = 20

Now, we know the sum of exterior angle is 360 degree

The given exterior angle is,

17x - 70 and 2x + 5

So, equate to 360°

17x - 70 + 2x + 5 = 360°

Now, solve for 'x'

19x - 65 = 360

19x = 360 + 65

19x = 425

x = 22.368 or 22.37

Hence, the value of x is 22.37 and y is 20

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Total number of rolls are 60, they used 1 and half roll per week. So, 40 weeks will it take them to run out of rolls of paper towels.

Paper towels are the disposable paper made up from the paper. It is an absorbent, which designed to absorb liquid. It is made up of pulp like tissue paper which are meant to be single time use only.

Paper towel is made up of cellulose fibers who are bigger in size consist of many small molecules linked together. Paper towels are used in drying, wiping, cleaning, toilets etc.

For given information,

Total rolls= 60

They used up 1 roll in 1.5 week or 1 week and half

So,

60 + 60*1/2

60+30= 90 weeks

Thus, total number of rolls are 60, they used 1 and half roll per week. So, 40 weeks will it take them to run out of rolls of paper towels.

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The solution to the equation are 5 or -1 after applying the quadratic formula.

Any equation of the form [tex]\rm ax^2+bx+c=0[/tex]  where x is variable and a, b, and c are any real numbers where a ≠ 0 is called a quadratic equation.

It is given that:

x² - 4x² - 5 = 0

The above equation is a quadratic equation:

Using the quadratic formula:

[tex]\rm $x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$[/tex]

Plug the values in the formula:

[tex]\rm $x=\dfrac{-(-4)\pm\sqrt{(-4)^2-4(1)(-5)}}{2(1)}$[/tex]

After solving:

x = 5 or -1

Thus, the solution to the equation is 5 or -1 after applying the quadratic formula.

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Answer:

Pete ate 2, Joe ate two, and Blake ate 1

2 + 2 + 1 = 5

They ate 5 out of 8 slices. The boys ate 5/8 of the pizza

Answer: 32

Step-by-step explanation: you have to count by 7 everytime

The overall speedup of such a system that spends 40% of its time performing calculations is 1.25 when a processor upgrade results in 100% more throughput.

The overall speedup of a machine that spends 40% of its time processing data with a processor upgrade that offers 100% more throughput answers the issue.

Thus, with a CPU upgrade that results in 100% more throughput, a system that spends 40% of its time performing calculations sees an overall speedup of 1.25.

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Answer:

Length: 42, width: 24

Step-by-step explanation:

Perimeter: 132

L: W = 7:4

7u+7u+4u+4u= 22u (Length + length + width + width)

132/22= 6 (1u)

6x4= 24 (Width/ 4u)

6x7=42 (length/7u)

recheck:

42+42+24+24= 132cm

perimeter= 132

Answer:

7w ≤ -25

Step-by-step explanation:

If 7 x W is at most -25 then it cant be greater than -25 but can be equal to it.

Hope this helped!

Applying the trigonometry ratio, SOH, the height, h = 6.2172 cm.

Area of the region that is shaded in the circle = 47.1784 cm²

Recall the formulas for the trigonometric ratios, which are given as SOHCAHTOA, where:

Find the height, h, of the triangle using the sine ratio of trigonometry:

∅ = 51°

Opposite length = h

Hypotenuse = 8 cm

sin 51 = h/8

h = 8(sin 51)

h = 6.2172 cm

Area of the triangle = 1/2(base)(height) = 1/2(8)(6.2172)

Area of the triangle = 24.8688 cm²

Area of the sector =  /360 × r² = 129/360 × (8²)

Area of the sector = 72.0472 cm²

Area of the shaded region = area of the sector - area of the triangle

= 72.0472 - 24.8688

= 47.1784 cm²

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Answer:

301.76

Step-by-step explanation:

I'll add a diagram for better understanding.  

Look at the diagram

The angle with a question mark in purple is the the bearing from the phone to the transmitter.

To figure out that angle we will have to figure out the angle inside the triangle on that side and we will subtract that from 360 to find the answer.

Since this is a right angled triangle, we can use SOH CAH TOA to figure out the angle inside.

For the angle we have to figure out, 21 is the opposite and 13 is adjacent.

so we will use TOA

tan[tex]x\\[/tex] = O/A

tan[tex]x[/tex] = 21/13

tan inverse(21/13) = [tex]x[/tex]

[tex]x[/tex] = 58.2405

This is the phone's angle inside the triangle
subtract this from 360 to find the bearing

360 - 58.2405 = 301.76

Answer:

y = - [tex]\frac{3}{4}[/tex] x + 5

Step-by-step explanation:

the hypotenuse is the line AB

the equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

calculate m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = A (0, 5 ) and (x₂, y₂ ) = B (4, 2 )

m = [tex]\frac{2-5}{4-0}[/tex] = [tex]\frac{-3}{4}[/tex] = - [tex]\frac{3}{4}[/tex]

the line AB crosses the y- axis at A (0, 5 ) ⇒ c = 5

y = - [tex]\frac{3}{4}[/tex] x + 5 ← equation of hypotenuse

Answer:

area increases by a factor of 4

Step-by-step explanation:

the area (A) of a rectangle is calculated as

A = lw ( l is length and w is width )

doubling the length and width , that is

l = 2l and w = 2w , then

A = 2l × 2w = 4lw

that is the area is increased by a factor of 4

Answer: 8 days

Step-by-step explanation: 138-42 = 96 then you divide that by daily fee of 12 to get 8 days

If they want to be 99% sure that their estimate will be within 3% of the true population percentage then the required sample size is n = 4161.

When there is no known population, the sample size can be calculated by determining the minimal sample size needed to accurately estimate proportions while taking the standard normal deviation into account.

We have been given the confidence level = c= 99%

Estimate percentage= 3%

We want to find the sample size when the true percentage is not given

Therefore Assume that true proportion = p = 0.5

Therefore the sample size is calculated as:

N= p(1-p) (zc/e) square

N = 4161

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The graph of the function y = -2 can be described as Horizontal.

Given, a function y = -2.

As, we can see that the given function is an one variable function.

And the functions in one variable have straight line graph.

Now, the function y = -2 has a graph that will be parallel to the x-axis.

So, the function y = -2 has a graph that will be horizontal as the x-axis is horizontal in cartesian plane.

Hence, the graph of the function y = -2 can be described as Horizontal.

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25.48 was spent on a pass and lunch for each student.

Total money spend on passes = 683.47

Total no. of people = 38 + 3

                                = 41

Money spend on pass for each person = 683.47/41

                                                                 = 16.67

Total money spend on lunch = 334.78

Total no. of students = 38

Money spend on lunch for each student = 334.78/38

                                                                   = 8.81

Total = 16.67 + 8.81

        = 25.48

Hence, 25.48 was spent on a pass and lunch for each student.

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Answer:

72.52

Step-by-step explanation:

circumference of a circle formula = [tex]2\pi r[/tex]

where r is the radius

the radius is half of diameter, and the diameters for all semicircles are given.

so the radius for the smaller semicircles is 10/2 which is 5

so [tex]2\pi 5[/tex] = 2(3.14)(5) = 31.4

31.4 is the circumference of the whole circle, since we have 2 semicircles with the same radius, we don't need to divide this by 2, we will simply use 31.4 for instead of doing this exact calculation again for the other small semicircle.

for the larger cemicircle, the diameter is 16 so the radius will be 16/2 which is 8

[tex]2\pi 8[/tex] = 2(3.14)(8) = 50.24

since 50.24 is the circumference of an entire circle, we will have to divide this by 2 to d=find the circumference of the semicircle.

50.24/2 = 25.12

Now we will simply add up the lengths of the borders,

31.4 + 25.12 + 16 = 72.52

Answer:

57.7 meters total perimeter for the object.

Step-by-step explanation:

See the attached worksheet. Break up the object into three circles and one rectangle. Label them to keep track of the work. The object's perimeter is coprised of:

- One side of rectangle R (16 m)

- 1/2 the circumference of circles b and c, each with a radius of 5 m

- 1/2 the circumference of circle a, with a circumference of 8 m.

The perimeter of a circle is 2πr. The perimeter of circles b and c is 31.4 meters in total, which is reduced to (1/2) or 15.7 m total. Circle a contributes 26 meters to the object's perimeter.

The sum of these measurements is (16m) + (15.7m) + (26m) = 57.7 meters total perimeter for the object.

There is only 1 real zero of the function.

What are Zeros of a Function?

The zeros of a function are the values of the function's variables that fulfil the equation and yield the function's value of 0. The zeros of a function can be represented graphically as the x-coordinates (x-intercepts) where the graph intersects the x-axis.

Solution:

As mentioned above,

The zeros of a function can be represented graphically as the x-coordinates (x-intercepts) where the graph intersects the x-axis.

So,

We can see that there is only one point where the graph intersects the x-axis.

Therefore, it can be said that there is only 1 real zero of the function.

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The expression for the other number is (n-1) when n is the greater of two consecutive numbers.

Given that,

We have to write an expression for the other number if n is the greater of two successive numbers.

We know that,

One is equal to the difference between any two consecutive numbers.

Let us take

x be the smaller of two consecutive number

n be the larger of two consecutive numbers

We have that

n-x=1

Solve for x

x=n-1

Therefore, The expression for the other number is (n-1) when n is the greater of two consecutive numbers.

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If wall-to-wall carpeting is installed in a room 21 ft long and 17 ft wide and the edges of the carpet are held down by tack strips, the feet of tack-strip material needed are 76 ft calculated by determining the perimeter of the rectangle room.

Tack strips are thin pieces of wood studded with nails or tacks in the installation of carpets. These thin strips are placed along all the edges of the carpet. In order to determine the length of the tack strips needed to hold the wall to wall carpeting installed in a rectangular room of 21 ft by 17 ft. The formula of the perimeter of a rectangle is:

P = 2 (length + width)

P = 2 (21 + 17)

P = 2 (38)

P = 76 ft

Hence, the feet of tack-strip material needed are 76 ft.

Note: The question is incomplete. The complete question is Wall-to-wall carpeting is to be installed in a rectangular room that is 21 ft long and 17 ft wide. The edges of the carpet are to be held down by tack strips. How many feet of tack-strip material is needed?

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Answer:

D

Given the inequation symbols > and < , the lines will be dotted.

The amount of zinc in the jar is 160 grams.

According to the question,

We have the following information:

In a certain chemical the of zinc to copper is 4 to 15 and a jar contains 600 grams of copper.

Let's take the amount of zinc in a chemical to be 4x and that of copper to be 15x.

So, we have the following expression:

15x = 600

Dividing both the sides by 15 will give us the value of x:

x = 600/15

x = 40 grams

Now, we will put this value of x in the amount of zinc:

4x grams

4*40

160 grams

Hence, the amount of zinc in the given jar is 160 grams.

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The number of discs that can be filled in the box is 17.

length of box , l =26 cm , breadth , b =15 cm , height = 20 cm

So,the volume of the box = l × b × h

= 26 × 15 ×20 cm³

= 7800 cm³

Now length of a disc case, l= 1.6 cm

breadth ,b =14.2 cm

height, h =19.3 cm

So the volume of a disc case = 1.6×14.2×19.3 cm³

= 438.496 cm³

No of disc cases can be stacked inside the box

= 7800 ÷ 438.496

=7800000÷438.496

= 17.8

Hence 17 disc cases can be fitted into the box.

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