Phillip received 75 points on a project for school. He can make changes and receive two-tenths of the missing points back. He can make corrections as many times as he wants. Create the formula for the sum of this geometric series, and explain your steps in solving for the maximum grade Phillip can receive. Identify this as converging or diverging.

Question

anonymous · Answer

@SolomonZelman

solomonzelman · Answer

This is not a geometric series because he isn't getting +1/5 of each previous attempt. The maximum score he can get is 120% of 75, or 75×1.2

which is 90.

anonymous · Answer

is therre a formula?

solomonzelman · Answer

I understood it incorrectly

solomonzelman · Answer

It is that he gets 20% off from his grade (as a penalty)

solomonzelman · Answer

Saying if he gets a 100, he will get 20% off from that, and the final grade would be 80.

anonymous · Answer

how do we know if its out of a 100

solomonzelman · Answer

Well, for maximum grade, he couldn't score more than a 100, right ?

anonymous · Answer

yes

solomonzelman · Answer

So, you have a 20% off penalty, is this so ?

anonymous · Answer

im confused on what to answer

anonymous · Answer

he can get 20% of a point back

solomonzelman · Answer

so he gets 20% of 75 back, plus 75.

solomonzelman · Answer

In other words 120% of 75

anonymous · Answer

90?

solomonzelman · Answer

Yes

anonymous · Answer

is it converging or diverging? @SolomonZelman

anonymous · Answer

@lupita1995

anonymous · Answer

@SolomonZelman

solomonzelman · Answer

I thought this question was already passed. I said that I don't think that it is a sequence.

anonymous · Answer

oh it asks in the question, so i thought it would be one of the two

anonymous · Answer

Brett has determined a function f(x) that shows the exponential growth of the number of shoes Larae owns each year. Explain how the f−1(x) can be found and what f−1(132) means.

anonymous · Answer

i understand that f^-1x is the inverse of f(x)

solomonzelman · Answer

f^(-1)x would be just the same way as any other inverse function, and f^(-1) (132) would be if you plug in 132 into the f(x)^(-1), instead of x.

anonymous · Answer

so what would i type to answer the full question..

solomonzelman · Answer

You didn't post the Brett's function

anonymous · Answer

what do you mean? this question has left me puzzled for two days now..

solomonzelman · Answer

well, I am not given the brett's function. I guess you should close this question and post a new one. Then, tag someone else.