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3 years ago

2:45pm to 5:30 pm how long did it take?

Mathematics

1 answer:

Marta_Voda [28]3 years ago

4 0

Answer:

2 hours and 45 minutes. or 165 minutes

Step-by-step explanation:

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What is the vertex of the graph of the function f(x) = x^2 + 8x - 2?

notsponge [240]

Answer:

(-4,-18)

Step-by-step explanation:

go to math(way).com to find the answer

8 0

3 years ago

Find the slope for each of the order pair. (-2,-1) and (8,-3)

kondaur [170]

Answer:

-0.2

Step-by-step explanation:

Slope (m) =ΔY/ΔX= 8-(-2)/-3-(-1)

= -1/5

= -0.2

4 0

3 years ago

In a random sample of 45 newborn babies, what is the probability that 40% or fewer of the sample are boys. (Use 3 decimal places

erastova [34]

Answer:

$z= \frac{p- \mu_p}{\sigma_p}$

And the z score for 0.4 is

$z = \frac{0.4-0.4}{\sigma_p} = 0$

And then the probability desired would be:

$P(p$

Step-by-step explanation:

The normal approximation for this case is satisfied since the value for p is near to 0.5 and the sample size is large enough, and we have:

$np = 45*0.4= 18 >10$

$n(1-p) = 45*0.6= 27 >10$

For this case we can assume that the population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

Where:

$\mu_{p}= \hat p = 0.4$

$\sigma_p = \sqrt{\frac{p(1-p)}(n} =\sqrt{\frac{0.4(1-0.4)}(45}= 0.0703$

And we want to find this probability:

$P(p$

And we can use the z score formula given by:

$z= \frac{p- \mu_p}{\sigma_p}$

And the z score for 0.4 is

$z = \frac{0.4-0.4}{\sigma_p} = 0$

And then the probability desired would be:

$P(p$

7 0

3 years ago

Read 2 more answers

Find the sum of the first 25 terms of the arithmetic sequnce 17,22,27,32.37

ANTONII [103]

Answer:

Step-by-step explanation:

This sequence is adding 5 so

17 22 27 32 37 42 47 52 57 62 67 72 77 82 87 92 97 102 107 112 117 122 127 132 137 = 1925

6 0

3 years ago

Read 2 more answers

It takes 12 painters to paint the walls of a school in 21 days. In how many days the same job will be completed with 14 painters

nikklg [1K]

Answer:

18 days.

Step-by-step explanation:

We have been given that 12 painters paint the wall of a school in 21 days.

So the wall painted by one painter will paint the wall in $21\times 12\text{ days}=252\text{ days}$

As one painter will paint the wall in 252 days, so to find the number of days it will take to paint the same wall by 14 painters, we will divide time taken by one painter (252) by 14.

$\text{Time take by 14 painters to paint the wall}=\frac{252}{14}$

$\text{Time take by 14 painters to paint the wall}=18$

Therefore, it will take 18 days to paint the same wall by 14 painters.

8 0

3 years ago