Nina deposit $3400 into a saving account that pays a simple annual interest rate of 2.2%.
how much interest will she earn after 3 months?
a) $1.87
b)$18.70
c)$22.44
d) 224.40

edwin deposited money into a savings account that pays a simple annual interest rate of 1.4%. he earned $24.50 in interest after 5 years.
how much did he deposit?
a) 122.50
b) 350.00
c) 875.00
d) 1750.00

1). Annual Simple Interest for Nina :

Principal = $3400

Rate = 2.2%

        = 0.022

Time = 3 months

Now, Simple interest is given by the formula = Principal × Rate × Time

⇒ Simple Interest = 3400 × 0.022 × 0.25

⇒ Simple Interest = $ 18.70

Hence, The correct option is B). $18.70

2). Annual Simple Interest for Edwin :

Simple Interest = $24.50

Rate = 1.4%

        = 0.014

Time = 5 years

Now, Simple interest is given by the formula = Principal × Rate × Time

⇒ 24.50 = Principal × 0.014 × 5

⇒ 24.50 = Principal × 0.07

⇒ Principal = $350

Hence, The correct option is B). $350.00

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870