$8000 are invested in a bank account at an interest rate of 9 percent per year. Find the amount in the bank after 15 years if interest is compounded annually.
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Find the amount in the bank after 15 years if interest is compounded quaterly.
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Find the amount in the bank after 15 years if interest is compounded monthly.
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Finally, find the amount in the bank after 15 years if interest is compounded continuously.
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you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)

i have not got your picture clearly so see it once again

45.36 feet per second

step-by-step explanation:

tyrone travels 30 miles in 58.2 minutes.  

1 mile = 5280 feet; this means he travels

30(5280) = 158400 feet in 58.2 minutes.

1 minute = 60 seconds; this means he travels 158400 feet in

58.2(60) = 3492 seconds.

this gives us the unit rate of

158400/3492 = 45.36 feet per second.