Question

The equation, y = 12841(1.01)x , represents the average cost of an education at a private college, after 1990. What is the average cost in 1990 (x = 0)?

A. $12,969
B. $12,841
C. $13,122
D. $13,099

Wouldnt the answer be A? (:

Answer 1

12841

Answer 2

assuming this is \[12841(10.1)^x\]

Answer 3

i mean \[12841(1.01)^x\]

Answer 4

No, its 1.01

Answer 5

ya lol

Answer 6

\[(1.01)^0=1\] so you just get the number in front

Answer 7

Right.

Answer 8

Which is what i did then i multiplied and got 12969.41 .... i must have mis calculated hold on i will try again

Answer 9

hold on multiplied by what? 1 times any number is just that number.

Answer 10

but isnt it 1.01 not 1?

Answer 11

oh no. anything to the power of zero is 1

Answer 12

you have \[12841(1.01)^x\] i am fairly sure the x is in the exponent. this is growth of 1% per year. when you replace x by 0 you get what you started with, which is the number out front, because \[(1.01)^0=1\]

Answer 13

Ahhh i see now (: Thank you!!!

Answer 14

welcome

Answer 15

hey poplak come look at the cool problem i did :)