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Klio2033 [76]
2 years ago
10

The perimeter of a semicircle is 25.7 feet. What is the semicircle's radius? Use 3.14 for ​.

Mathematics
1 answer:
jarptica [38.1K]2 years ago
7 0

Answer: 4.09

Step-by-step explanation:

25.7 divided by pie is 8.18 which is the diameter. divide that by 2 and u get the radius.

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Please help I don’t know if I’m doing this correctly
solmaris [256]

Answers:

  1. Exponential and increasing
  2. Exponential and decreasing
  3. Linear and decreasing
  4. Linear and increasing
  5. Exponential and increasing

=========================================================

Explanation:

Problems 1, 2, and 5 are exponential functions of the form y = a(b)^x where b is the base of the exponent and 'a' is the starting term (when x=0).

If 0 < b < 1, then the exponential function decreases or decays. Perhaps a classic example would be to study how a certain element decays into something else. The exponential curve goes downhill when moving to the right.

If b > 1, then we have exponential growth or increase. Population models could be one example; though keep in mind that there is a carrying capacity at some point. The exponential curve goes uphill when moving to the right.

In problems 1 and 5, we have b = 2 and b = 1.1 respectively. We can see b > 1 leads to exponential growth. I recommend making either a graph or table of values to see what's going on.

Meanwhile, problem 2 has b = 0.8 to represent exponential decay of 20%. It loses 20% of its value each time x increases by 1.

---------------------

Problems 3 and 4 are linear functions of the form y = mx+b

m = slope

b = y intercept

This b value is not to be confused with the previously mentioned b value used with exponential functions. They're two different things. Unfortunately letters tend to get reused.

If m is positive, then the linear function is said to be increasing. The line goes uphill when moving to the right.

On the other hand if m is negative, then we go downhill while moving to the right. This line is decreasing.

Problem 3 has a negative slope, so it is decreasing. Problem 4 has a positive slope which is increasing.

7 0
1 year ago
(PLZ help)
Alina [70]
1. Is 46.7
2. x =57
3. 15.22
4. 14 + j = 28
5. 
8 0
3 years ago
Read 2 more answers
Kerry is on the cross country team. She runs 3 miles every day except on her birthday. How many miles does she run each year?
Marina86 [1]

Answer:

1,092 miles

Step-by-step explanation:

There are 365 days in a year. Subtract 1 day because of her birthday. So what you're going to do is multiply 3 times 364 which equals 1,092.

So Kerry runs 1,092 miles each year.

4 0
3 years ago
What is 98% as a fraction in its simplest form
Nat2105 [25]
98% = 98/100 = 49/50
7 0
3 years ago
What is 8.517 in expanded form
Maru [420]
Eight and five hundred seventeen thousandths.
5 0
3 years ago
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