Discovery Homework Help Kiosk!

[Heartless]

hello

so right now I need some math help. We're reviewing for final exams and I need help with 2 more problems on this sheet. They're related to logs and exponents. You DO NOT have to tell me the answers, just guide me as to what to do.


Ok, 1st one.

Daniel's Print Shop purchased a new printer for $35,000. Each year it depreciates (loses value) at a rate of 5%. What will its approximate value be at the end of the fourth year?
a) $33,250.00
b) $30, 008.13
c) $28,507.72
d) $27,082.33
This is what I did: (The formula is y=a(b)^x)
y=x
a=35,000
b=.05 -> (5%)
x=4
So I put this together, x=35000(.05)^4, but I got 2187.5
So there's my problem with that one, not sure what to do, help is really appreciated.


2nd one

On January 1, 1999, the price of gasoline was $1.39 per gallon. If the price of gasoline increased by 0.5% per month, what wsa the cost of one gallon of gasoline, to the nearest cent, on january 1 one year later?
-I really don't know in this one, would the ^x be 4, or 5? It would be I guess x=1.39(0.5)^4, right?

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