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NeX [460]
3 years ago
13

If the diameter of the semicircle is 1.7 centimeters, what is the circumference of the semicircle?

Mathematics
1 answer:
spin [16.1K]3 years ago
6 0
The formula for circumference is C=2 \pi r or C= \pi d.  We have a diameter for the semicircle, so let's use the diameter formula.  C= \pi (1.7) which is either C=1.7 \pi or C = 5.338 if we multiply pi in as 3.14.  BUT this is only half a circle, so we only have half that distance around the outside.  Therefore, the circumference of half this circle is 2.669 cm.  But we need to add the 24 mm in.  24 mm in centimeters is 2.4 cm.  So 2.669 + 2.4 = 5.069
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3 years ago
Which expression is equivalent to 1/2(2x-8)<br> A) 4x− 16<br> B) x− 4<br> C) 2x− 4<br> D) x− 8
inn [45]

Answer:

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Step-by-step explanation:

In this question, you have to simplify the expression to get your answer.

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5 0
3 years ago
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mamaluj [8]

The results of the survey are shown in the table.

It's required to calculate the following probabilities:

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p=\frac{79}{367}

b) A customer is a walk-in

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p=\frac{106}{367}

c) A customer is dissatisfied and a walk-in.

We have to cross the row Dissatisfied with the column Walk-in. The number of customers that have both categories is 22 out of 367.

The required probability is:

p=\frac{22}{367}

d) A customer is very satisfied given he saw a TV ad.

This is a conditional probability, where the total is 111 because is the given condition. The customers that have both characteristics are 33, thus the required probability is:

p=\frac{33}{111}=\frac{11}{37}

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Total customers with one or both features: 139 + 150 - 62 = 227

We have to subtract the common feature because it was counted twice.

The required probability is:

p=\frac{227}{367}

6 0
1 year ago
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