Mr. Smith opened a retirement account with a deposit of $900. This account earns 5% simple interest annually. How many years will it take for his $900 deposit to earn $360 interest?

8 months=0.6 years

Step-by-step explanation:

I =PRI, where I is the interest=$360

           where P is the principal=$900, and

           where T is the time in year.

I =PRI

$360=$900*5%*T

$360=$900*5/100*T

$360=9*5*T

$360=45T

$360/45=45T/45

T=360/45

T=8 months=0.6 years

good luck on your studies! : )

david edward.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have