Question

Katie earned $480 in 8 years on an investment at a 6% annual simple interest rate. How much was Katie’s investment?



A.$1000

B.$2500

C.$4500

D.$9000

Answer 1

Marie mixes 20 liters of 12% acid solution with a 36% acid solution to make a 20% acid solution.

How many liters of 36% solution did she use?

Answer 2

@ReadytoLearn_Student

Answer 3

What do you thunk we will do? Add, subtract, etc?

Answer 4

For which one

Answer 5

The second one with Marie :)

Answer 6

Subtract

Answer 7

@ganpat is writing an answer, let's see what he/she says

Answer 8

For the 1st one, use following formula

A = P(1 + rt)

A = Amount (principal + interest)
P = Principal Amount
I = Interest Amount
r = Rate of Interest per year in decimal
t = Time Period

You have to calculate P !!

Answer 9

For second one..

Answer 10

I just solved already but thanks

Answer 11

Calculate x..

Answer 12

10 liters

Answer 13

rightt !!

Answer 14

@ReadytoLearn_Student : It's he :p

Answer 15

oh whoops :p