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3 years ago

Help me plz thxxx thx thx

Mathematics

1 answer:

ioda3 years ago

3 0

The area of the base is 25, and the height is 12+12*2=36, so the volume is 25*36=900.

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Please help mee

NemiM [27]

(2^6)^x=1
(4)^x=1
(4)^0=1
1=1
X=0

(5^0)^x=1
(1)^x=1
x=(-∞,∞)

5 0

2 years ago

Simplify 3(x+2)-9x+5

Nimfa-mama [501]

It would be...
-6x+11

6 0

3 years ago

Read 2 more answers

A study of recent records of car accidents revealed that average proportion of drivers who were distracted by their phones at th

aksik [14]

Answer:

At least 547 records need to be studied.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence interval $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

Z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

And the margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

95% confidence interval

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $z = 1.96$ .

In this problem, we have that:

$M = 0.04, p = 0.35$

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.04 = 1.96\sqrt{\frac{0.35*0.65}{n}}$

$0.04\sqrt{n} = 0.93486$

$\sqrt{n} = 23.37$

$n = 546.2275$

At least 547 records need to be studied.

6 0

4 years ago

Abdul runs 7 miles in 64 minutes. How many minutes does he take per mile?

jekas [21]

64/7=9.14285714. It takes 9.14285714 or about 9 minutes to run a mile.

44/9=4.88888889. It takes 4.88888889 or about 5 dollars per hour.

Hoped I helped!

5 0

3 years ago

Read 2 more answers

What is the sum of 12,837.45 and 15,910.65? Enter your answer in the box below.

Minchanka [31]

Answer: 28748.1

Step-by-step explanation:

6 0

3 years ago