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josegalvan123jg69
19.08.2021 •
Mathematics
A phone call costs $0.65 for the first 3 minutes and $0.15 for each additional minute. If the total charge for the call was $5.00, how many minutes was the call?
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Ответ:
31 Minutes
Step-by-step explanation:
4.78 = 0.15 + 0.58
0.15m = 4.78 - 0.58
m = 4.78 - 0.58 divided by 0.15 = 28 minutes
So in total we have 28 + 3 = 31 minutes
Ответ:
4/3pi
Step-by-step explanation:
Length of an arc = r theta
Given radius r = 30
length of arc l = 40
Substitute
40 = 30theta
theta = 40/30
theta = 4/3 pi
Hence the angle marked B is 4/3pi