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REY [17]
3 years ago
15

Sam cleaned of his house in 50 minutes. How many hours will it take him to clean his entire house?

Mathematics
2 answers:
Ira Lisetskai [31]3 years ago
7 0

Answer:

20min

Step-by-step explanation:

Shtirlitz [24]3 years ago
4 0
They cleaned how much of the house in 50 minutes? If you tell me this, I can give you an answer.
You might be interested in
we believe that 42% of freshmen do not visit their counselors regularly. For this year, you would like to obtain a new sample to
Maksim231197 [3]

Answer:

A sample of 1077 is required.

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 level of 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}.

The margin of error is of:

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

42% of freshmen do not visit their counselors regularly.

This means that \pi = 0.42

98% confidence level

So \alpha = 0.02, z is the value of Z that has a pvalue of 1 - \frac{0.02}{2} = 0.99, so Z = 2.327.

How large of a sample size is required?

A sample size of n is required, and n is found when M = 0.035. So

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

0.035 = 2.327\sqrt{\frac{0.42*0.58}{n}}

0.035\sqrt{n} = 2.327\sqrt{0.42*0.58}

\sqrt{n} = \frac{2.327\sqrt{0.42*0.58}}{0.035}

(\sqrt{n})^2 = (\frac{2.327\sqrt{0.42*0.58}}{0.035})^2

n = 1076.8

Rounding up:

A sample of 1077 is required.

3 0
3 years ago
What is the perimeter of Justin's garden in inches? I can't find the right answer 6 yards and 8 yards its a rectangle garden pls
madreJ [45]

Answer:

28 yards

Step-by-step explanation:

It's perimeter so you add (6x2)+(8x2)

The x2 is because there's 2 of each side

3 0
3 years ago
What is the answer to this question
Schach [20]
Vertical angles are equal

4x = 45 + 15
4x = 60
x = 60/4
x = 15
8 0
3 years ago
Read 2 more answers
(03.01 LC)
Sedaia [141]
  • Perpendicular=P=4
  • Base=B=4

Hypotenuse be H

Apply Pythagorean theorem

\\ \tt\hookrightarrow H^2=P^2+B^2

\\ \tt\hookrightarrow H^2=4^2+4^2

\\ \tt\hookrightarrow H^2=32

\\ \tt\hookrightarrow H=\sqrt{32}

\\ \tt\hookrightarrow H=5.8units

8 0
2 years ago
-4(w+1)=-24 solve for w
sineoko [7]

Answer:

w = 5

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

−4(w+1)=−24

(−4)(w)+(−4)(1)=−24(Distribute)

−4w+−4=−24

−4w−4=−24

Step 2: Add 4 to both sides.

−4w−4+4=−24+4

−4w=−20

Step 3: Divide both sides by -4.

-4w/-4 = -20/-4

w=5

<em>Hope this helped and plz mark as brainliest!</em>

<em></em>

<em>Luna G.</em>

8 0
3 years ago
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