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3 years ago

The circumference of a circle is 47.1 feet. What is the diameter of the circle? 7.5 ft 15 ft 147.9 ft 30 ft

2 answers:

6 0

Hi Zack! Thanks for asking a question here on Brainly.

█ Explanation █

✦ We are looking to find the diameter of the circle.
✦ Do the following formula to find the diameter.
✦ $47,1/ \pi =47.1/3.14$
✦ = 15 ft

Answer: 15 ft

Hope that helps! ★ If you have further questions about this question or need more help, feel free to comment below or leave me a PM. -UnicornFudge aka Nadia

4vir4ik [10]3 years ago

5 0

Answer:

B. 15 ft.

Step-by-step explanation:

We have been given that the circumference of a circle is 47.1 feet. We are asked to find the diameter of the circle.

We will use circumference of circle formula to solve our given problem.

$C=\pi D$

Upon substituting the measure of circumference in formula, we will get,

$47.1=3.14* D$

Now, we will divide both sides of our equation by 3.14.

$\frac{47.1}{3.14}=\frac{3.14* D}{3.14}$

$15=D$

Therefore, the diameter of our given circle is 15 feet and option B is the correct choice.

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In her art studio, Jamie wants the throwing wheel to be 3 feet from the sink, and the table to be both 5 feet from the sink and

oee [108]

I know my picture stinks, but it is possible. If you make it into a triangle shape, but move the table a bit closer to the throwing wheel (as shown) it works out great. If you ever get a problem like his again, just think outside the box for different solutions.

6 0

3 years ago

A half-century ago, the mean height of women in a particular country in their 20s was 64.7 inches. Assume that the heights of

Ainat [17]

Answer:

99.5% of all samples of 21 of today's women in their 20's have mean heights of at least 65.86 inches.

Step-by-step explanation:

We are given that a half-century ago, the mean height of women in a particular country in their 20's was 64.7 inches. Assume that the heights of today's women in their 20's are approximately normally distributed with a standard deviation of 2.07 inches.

Also, a samples of 21 of today's women in their 20's have been taken.

Let $\bar X$ = sample mean heights

The z-score probability distribution for sample mean is given by;

Z = $\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } }$ ~ N(0,1)

where, $\mu$ = population mean height of women = 64.7 inches

$\sigma$ = standard deviation = 2.07 inches

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) 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.

Now, Probability that the sample of 21 of today's women in their 20's have mean heights of at least 65.86 inches is given by = P( $\bar X$ $\geq$ 65.86 inches)

P( $\bar X$ $\geq$ 65.86 inches) = P( $\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } }$ $\geq$ $\frac{65.86-64.7}{\frac{2.07}{\sqrt{21} } }$ ) = P(Z $\geq$ -2.57) = P(Z $\leq$ 2.57)

= 0.99492 or 99.5%

The above probability is calculated by looking at the value of x = 2.57 in the z table which has an area of 0.99492.

Therefore, 99.5% of all samples of 21 of today's women in their 20's have mean heights of at least 65.86 inches.

3 0

3 years ago

Divide 85 into the ratio of 2:3:5

alukav5142 [94]

The actual amount that needs to be divided = 85
The ratio in which the amount needs to be divided = 2:3:5
Let us assume the common ratio to be = x
Then
2x + 3x + 5x = 85
10x = 85
x = 85/10
= 8.5
Then
The ratio in which the number 85 will be divided = 2 * 8.5:3 * 8.5:5 * 8.5
= 17:25.5:42.5
So from the above deduction we can see that the number 85 can be divided in the ratio 17:25.5:42.5

4 0

3 years ago

How many eighths are there in six and three quarters

Alex787 [66]

That questions has to do with equivalent fractions, express a fraction in eights.
six and three quarters
= 6 3/4
= 6 + 3/4
= 24/4 + 3/4
= 27/4
and to convert that fraction to eights, just multiply numerator and denominator by 2:
= (27*2)/(4*2)
= 54/8
there are 54 eights in six and three quarters

3 0

3 years ago

Pls help me quick I will name brainliest

Artist 52 [7]

1.47 2.156 3.62 4.58

8 0

2 years ago

Read 2 more answers