A bookstore costs $90 a day to keep open, and spends $12 for each book it sells. The store charges $18 for each book it sells. If n represents the number
of books sold, which equation represents the cost function for this
bookstore?
A. C= 90n + 15
B. C= 90n + 12
C. C = 12n +90
D. C= 18+ 90

answer: im sorry i dont get it

step-by-step explanation:

(a) common ratio in the given sequence is, 3

(b) push ups will do kendall do on the 20th week

step-by-step explanation:

geometric sequence is a sequence of numbers that follows a pattern were the next term is found by multiplying by a constant called the common ratio(r)

(a)

given the sequence: 6 , 18 , 54 , 162 ,

this sequence is geometric sequence where each term is 3 times the previous term.

therefore,

common ratio(r) = 3.

(b)

a formula for nth term of geometric sequence is given by;

,   where r is the common ratio between the successive terms and is the first term,

to find how many push ups will kendall do on the 20th week.

here. n = 20th term.

in the given sequence first term

then;

simplify:

therefore, push ups will do kendall do on the 20th week

b.

step-by-step explanation:

most likely linear (proportionate)

step-by-step explanation:

as time increases heart rate increases