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2 years ago

Only 12 people can ride a trolley at one time. This is 20% of the people waiting to ride. How many people are waiting to ride?

Mathematics

2 answers:

taurus [48]2 years ago

7 0

Answer: 60
explanation:
12=20%(x)
reverse operations
12/.20=x
x=60

Thepotemich [5.8K]2 years ago

6 0

Answer:

2 people are waiting if you want a whole number

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Step-by-step explanation:

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3 years ago

The circumference of a circle is 147 cm.<br> What is the radius of the circle?

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3 years ago

A fast food restaurant executive wishes to know how many fast food meals teenagers eat each week. They want to construct a 99% c

Lana71 [14]

Answer:

The minimum sample size required to create the specified confidence interval is 2229.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

What is the minimum sample size required to create the specified confidence interval

This is n when $M = 0.06, \sigma = 1.1$

$0.06 = 2.575*\frac{1.1}{\sqrt{n}}$

$0.06\sqrt{n} = 2.575*1.1$

$\sqrt{n} = \frac{2.575*1.1}{0.06}$

$(\sqrt{n})^{2} = (\frac{2.575*1.1}{0.06})^{2}$

$n = 2228.6$

Rounding up

The minimum sample size required to create the specified confidence interval is 2229.

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3 years ago

Which traingle are congruent by asa

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Im pretty sure that the answer is B.

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3 years ago

Help please 50 points

Hatshy [7]

For this, it is kind of like a triangle and having to find the diagonal. Let's see what the two legs of the triangle would be.
Leg one= 7 units
Leg two= 8 units
8²+7²= c²
64 + 49=113
√113≈10.6
The line is 10.6 units long.

4 0

3 years ago

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Only 12 people can ride a trolley at one time. This is 20% of the people waiting to ride. How many people are waiting to ride?​

Only 12 people can ride a trolley at one time. This is 20% of the people waiting to ride. How many people are waiting to ride?