Question

Please help, will give fan and medal!!!!!

Match the information about interest earned with the principal amount invested. Remember the equation for calculating simple interest is I = prt

$42 over 2 years at an interest rate of A) p = $400
$40 over 4 years at an interest rate of B) p= $600
$48 over 2 years at an interest rate of C) p= $500
$40 over 2 years at an interest rate of D) p= $700

Answer 1

Well, what we are given is

I "interest earned"
T "time"
and
P "principal balance

what are we supposed to be matching? we would need an interest rate to match the equations to the answers...

Answer 2

idk, thats the whole question...

Answer 3

there is NO interest rate given in the question?

Answer 4

ohh!!!!!!!!!!!!!! hahaha, yeah, there is, im editing it now.. lol

Answer 5

lol okay :)

Answer 6

$42 over 2 years at an interest rate of 3% A) p = $400
$40 over 4 years at an interest rate of 2% B) p= $600
$48 over 2 years at an interest rate of 4% C) p= $500
$40 over 2 years at an interest rate of 5% D) p= $700

Answer 7

Okay there we go lol

so now...we are given

I "interest earned"
T "time"
and
R "rate"

we want to solve for p "principal balance

So with the equation...

I = prt

how do we rearrange that to solve for 'p'?

Answer 8

idk why do you think im on openstudy

Answer 9

lol.......

Answer 10

lol nice answer :P

I = prt

divide both sides by rt "to isolate p"

\[P = \frac{ I }{ rt }\]

Answer 11

..

Answer 12

so for like equation 1...

$42 over 2 years at an interest rate of 3%

I = 42
t = 2
r = .03

so

\[P = \frac{ 42 }{ 2(.03) }\]

what does P equal?

Answer 13

42 / 2 ? :D

Answer 14

lol hang on a second okay?

Answer 15

ok..