Question

WILL FAN AND MEDALLL D: HALP MEH

Mr. Fromm earned $100 by investing $4000 in a savings account earning simple interest for 6 months. Write an equation to find the annual interest rate. Solve. Show all work.

Answer 1

@omgsomeonehelpmeplzD:

Answer 2

Omg someone helllp

Answer 3

OMG.

Answer 4

WHERES ALL THE QUALIFIED HELPERs AT

Answer 5

ffs

Answer 6

so what do you know about simple interest?

any formula?

Answer 7

Not really..

Answer 8

Simple interest = I = PNR

where P = principal amount = 4000
I = 400 given
N = number of years, here 6 months, so N = 1/2
R = interest rate is what we need to find :)

Answer 9

so plug in the given values!
only R is unknown

Answer 10

OK, but i dont see how I would = 400

Answer 11

`earned $100`
its the interest that he earned by keeping $4000 in the bank.

so, this $400 is actually the interest value = I

Answer 12

Ohh ok

Answer 13

So now what do we do e.e

Answer 14

plug in known values!

400 = 4000 * (1/2) * R

try to isolate R

Answer 15

OK got it, now what?

Answer 16

multiply 2 on both sides, and divide both sides by 4000 will give you,

R = 400 * 2/ 4000

so what the value of R?

Answer 17

are you there?

Answer 18

Yes sorry i had to eat

Answer 19

so what value of R did u get?

Answer 20

i dont get the last step..

Answer 21

is it 0.2?

Answer 22

yes!
good :)

0.2 or 20% both are same.

Answer 23

Thanks!!!

Answer 24

welcome ^_^