blopie help me :(((((

Answer:

The probability that a light bulb picked at random will last between 1400 and 1500

P(14 00≤X≤1500) = 0.032

Step-by-step explanation:

Explanation:-

Given that mean of the Population = 1000

Given that the standard deviation of the Population = 250 hours

Let 'X' be the random variable in a normal distribution

Let  X = 1400

[tex]Z = \frac{X-mean}{S.D} = \frac{1400-1000}{250} = 1.6[/tex]

Let X = 1500

[tex]Z = \frac{X-mean}{S.D} = \frac{1500-1000}{250} = 2[/tex]

The probability that a light bulb picked at random will last between 1400 and 1500

P(x₁≤ X ≤x₂) = P(Z₁≤ Z ≤z₂)

                   = A( Z₂ ) -A(Z₁)

P(1400≤X≤1500)  = P(1.6≤ Z ≤2)

                            =  A(2 ) -A(1.6)

                           =  0.4772-0.4452

                          = 0.032

Final answer:-

The probability that a light bulb picked at random will last between 1400 and 1500

P(14 00≤X≤1500) = 0.032

Answer: travel speed is = 10 m/sec

so for 20 meter = 20/10 = 2 sec

Step-by-step explanation:

Answer:

Percent decrease in population = 12%

Step-by-step explanation:

Given that:

Population of city = 160,000

Population of city after several years = 140,800

Difference= 160000 - 140800 = 19200

Percent decrease = [tex]\frac{Difference}{Population} * 100[/tex]

Percent decrease = [tex]\frac{19200}{160000}*100[/tex]

Percent decrease = 0.12 * 100

Percent decrease = 12%

Hence,

Percent decrease in population = 12%

Answer:

It goes up one number counting each time

Step-by-step explanation:

3 4 5  2 one cap

5 8 13   two cap

Answer:

Your image wont load IM SO SORRY:(

Step-by-step explanation:

Answer:

23 weeks because the penny is 161 and u dividing 161 by 7 because 1week hace 7 days and calculate 161÷7=23

the answer is 23 week

Answer:

9.3 x 8.5 = 79.05

7.6 x 2.4 = 18.24

an easier way to multiply decimals is to take away decimals and add later

example: 9.3x8.5 > 93x85 = 7905 since there are two places behind the decimal add that many to the solution 7905 > 79.05

Answer:

Grace scored 9 points in her first game.

Step-by-step explanation:

In her first game, she scored n points.

She scored 8 more points in her second game than in her first

So n + 8.

3 fewer points in her third game than in her second

So n + 8 -3 = n + 5

11 more points in her fourth game than in her third

n + 5 + 11 = n + 16

A total of 25 points in her fourth game.

This means that:

n + 16 = 25

n = 9

So

Grace scored 9 points in her first game.

Answer:

Longer than 27.7 minutes.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

[tex]\mu = 25, \sigma = 4[/tex]

The slowest quarter of customers will require longer than how many minutes (to the nearest tenth) for a simple haircut?

Longer than the 100 - 25 = 75th percentile of times, which is X when Z has a pvalue of 0.75. So X when Z = 0.675. So

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]0.675 = \frac{X - 25}{4}[/tex]

[tex]X - 25 = 4*0.675[/tex]

[tex]X = 27.7[/tex]

So

Longer than 27.7 minutes.

Answer:

They can make 10 different groups of three.

Step-by-step explanation:

The order in which the people are in the car is not important, so we use the combinations formula to solve this question.

Combinations formula:

[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.

[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]

How many different groups of three can the five of them make?

Combinations of 3 from a set of 5. So

[tex]C_{5,3} = \frac{5!}{3!(5-3)!} = 10[/tex]

They can make 10 different groups of three.

the answer is 5/12....

i think thats correct

Answer:

15

Step-by-step explanation:

if 3x3 is 9 and 4x3 is 12 then 5x3 is 15

infinitely many solutuinsAnswer:

Step-by-step explanation:

Answer:

Option D : [tex]\frac{x^2-9}{x^2-4}[/tex] is the correct answer.

Step-by-step explanation:

Given rational expression is:

[tex]\frac{x+3}{x+2}*\frac{x-3}{x-2}[/tex]

In the first step of solving the rational expression, we will multiply the nominators and denominators.

[tex]\frac{(x+3)(x-3)}{(x+2)(x-2)}[/tex]

[tex]\frac{x^2-3x+3x-9}{x^2-2x+2x-4}[/tex]

Now we will solve the alike terms.

[tex]\frac{x^2-9}{x^2-4}[/tex]

The product of rational expression is [tex]\frac{x^2-9}{x^2-4}[/tex]

Hence,

Option D : [tex]\frac{x^2-9}{x^2-4}[/tex] is the correct answer.

Answer:

option D

Step-by-step explanation:

Ap3x

Answer:

How much do the adukts weigh?

Step-by-step explanation:

Answer:

√430 or 20.74

Step-by-step explanation:

√430

Prime factorize 430

√2 · 5 · 43

There are no pairs to take out of the root, so the most simplified form of √430 is √430.

If you want the decimal form, it is 20.74

Please mark me Brainliest :)

Answer:

Good for her.

Answer:

ok wheres the question

Step-by-step explanation:

Answer:

I have a feeling it won't be exactly 15 minutes but it'll be around that time, if it's true.

Step-by-step explanation:

Step-by-step explanation:

* 1,653 x 4 = 6612

* 1,653 x 13 = 21489

* 1,653 x 1 1/2 = 2479.5

I hope it helps.

Answer: he should also add that the sides are the same and the shapes look same

Step-by-step explanation:

it looks very same though, how is it different?

Answer:

About 13 ml

Step-by-step explanation:

The child weighs 56 lbs. We need to first convert the weight of the child from lbs to kg so that we can know the amount of drug in mg is needed to be given to the child.

1 lb = 0.4536 kg

[tex]56\ lbs=56\ lbs*\frac{0.4536\ kg}{1\ lb} =25.4\ kg\\\\[/tex]

Therefore the amount of mg needed to be administered to the child = 50 mg/kg * 25.4 kg = 1270 mg

Since the oral suspension is in 100 mg per ml, hence:

Amount per dose = 1270 mg / (100 mg/ml) = 12.7 ml ≅ 13 ml

The child should be given 13 ml for each dose.

Answer:

to be honest this was hard and even I don't know it but I will give it a shot so I guess you divide or sub I don't know 804 divide by 150? then round your answer to the nearest 10th degree. if this is wrong I deeply apologize

Answer:

,mbn ,bmnbb

Step-by-step explanation:

nnbn bn bn

Answer:

c

Step-by-step explanation:

i took the quiz

Answer: a = 162

Step-by-step explanation:

Answer:

a=162

Step-by-step explanation:

Answer:

13.125

Step-by-step explanation:

Since the triangles are congruent, you would get the equation 4z-7=11z-112.

Then, you would subtract 4z from each side, leaving behing -7=8z-112. Then, you would add 112 to each side, getting 105=8z. Divide both sides by 8, and your answer is z=13.125

Answer:

Area = 24.54

Step-by-step explanation:

two sides have lengths 5 and 13.

Let the two sides be;

a = 5

b = 13

The angle between them is 49

C = 49°

Let the third side be c

Thus, using cosine rule, we can find the side c.

c² = a² + b² - 2ac•Cos C

Plugging in the relevant values, we have;

c² = 5² + 13² - 2(5 × 13)Cos 49

c² = 25 + 169 - 130(0.6561)

c² = 108.707

c = √108.707

c = 10.43

Since we now have 3 sides, from herons formula, we can find the area;

Area = √[p(p − a)(p − b)(p − c)]

Where p is half of the perimeter = (a + b + c)/2 = (5 + 13 + 10.43)/2 = 14.215

Thus;

Area = √(14.215(14.215 - 5)(14.215 - 13)(14.215 - 10.43))

Area = √602.4

Area ≈ 24.54

Answer:

−6(a+8)

=(−6)(a+8)

=(−6)(a)+(−6)(8)

=−6a−48

Step-by-step explanation:

multiply -6 x a to get -6a and multiply -6 x 8 to get -48 so -6a-48