A video store rents, on average, 240 videos a day for $2.00 each. The store determined that for every $0.25 that it increases the rental fee, the number of daily rentals will decrease by 10. This relationship can be represented by

y=(240-10n)(2+0.25n)

where y is the daily income in dollars from video rentals and n is the number of $0.25 increases. Based on this relationship, at what rental fee per video will the store have its highest daily income?

A)$2

B)$4

C)$4.25

D)$7.75

E)$8

SAT2 question:)

-When do we use a comma before “for”?

Although Samantha (was) the (least experienced) violinist in the competition, her final performance was more (brilliantly) executed (than any) of her competitors. Answer:D

is “any” usually wrong when used in comparisons?

I asked two writing questions yesterday.Why didn’t you answer them? was my grammar bad? :S

I am taking the test on dec should I solve a full-length test everyday?

Triangles ABC and ABD share side AB.

Triangle ABC has area Q and triangle ABD has area R. If AD is longer than AC and BD is longer than BC, which of the following could be true?

I-R> Q

II R=Q

III R < Q

I chose "I" only but the answer was E (all of them could be.) How can the second and third condition be true?

Thanks in advance!

I registered in NOV test sat1 ,but I will have it in another country because the country i live in has it only for sat subject test.

I will travel on Thursday morning ,So i won’t be able to solve a full length test on thursday. On Tuesday and Wednesday i will solve a full length one. Can i solve a full length on friday?

Also is it a good idea to solve a full length test everyday ,except on friday, the week before the test?

I need your opinion and if you have any advice tell me please.

What is the area of the largest circle that can be inscribed in a semicircular region of radius r?

A) pir^2/4

B) pir^2/3

C) pir^2/2

D) 2/3 pi r^2

E) 3/4pir^2

I don’t understand why the circle inscribed radius is half the semicircular ones?

(Something of) a history buff,my uncle has a collection (of) first edition biographies that (has been featured) in newspaper articles and magazine stories (alike).

Is “something of a history buff” modifiying the uncle? if no, then what does it function?

Thanks in advance = )

The figure above represents four offices that will be

assigned randomly to four employees, one employee

per office. If Karen and Tina are two of the four

employees, what is the probability that each will be

assigned an office indicated with an X ?

The figure is Four boxes or (offices) and two of them are labeled X.

Can you explain number 14 in diagnostic drill 3?

I tried solving it and i read the explanation of patterns.

i got the repeating units of the sequence which is 1,4,6,4,6,4,6

when he asked for the 53rd term should I divide 53 by 3 or 2?

I got confused because the one isn’t repeated again in the pattern.

Thanks in advance =)