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WARRIOR [948]
3 years ago
13

Find the arc length of a central angle of 90° in a circle whose radius is 4 inches

Mathematics
1 answer:
Pani-rosa [81]3 years ago
7 0
This is 1/4 * circumference
Circumference = 2 * pi * 4 = 8pi

arc length = 1/4  * 8pi = 2pi  or 6.28 ins to nearest hundredth.
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Anna [14]

Answer:

c. the biology test

Step-by-step explanation:

To answer this problem we need to calculate the z-score of both tests, using the formula:

z = (x - μ) / σ

Where x is Sue's score, μ is the mean, and σ is the standard deviation.

  • For the <u>biology test</u>, the z-score is:

z = (76 - 70) / 7 = 6/7 = 0.857

  • For the <u>math test</u>, the z-score is:

z = (76 - 75) / 10 = 1/10 = 0.100

Because the z-score for the biology test is greater than the z-score for the math test, Sue did better in the biology test, in comparison to the rest of the class.

6 0
3 years ago
15 points! Will give BRAINLIEST! Please help!
strojnjashka [21]

Answer:

a. 1.2

Step-by-step explanation:

b. 0.4

5 0
2 years ago
for his long distance phone service, Hans pays $2 monthly fee plus 12 cents per minute. Last month, hans's long distance bill wa
svp [43]
Let m stand for number of minutes
.12m+2=25.04
.12m-2=25.04-2
.12m=23.04
.12m÷.12=23.04÷.12
m=192
The number of minutes is 192 minutes.
Hope that helps you!!
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3 years ago
Need help with 4,5,6,,7,8,9 and number them plz it's due tomorrow. It says list or prime factorization to find lcm
Alex17521 [72]
The answers to the questions

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Christina scored a certain number of goals, g, during a soccer season. Sarah scored twice as many goals during the same season.
Norma-Jean [14]
S=2g or y=2x because you are multiplying Christina score by two to get Sarah's score.
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