According to the rule of 72, if katelyn invests $50, $100, and $200 into three separate accounts with the same interest rate, which amount will double fastest?

All amount will double at the same time.

Step-by-step explanation:

The rule of 72, is the simple and popular way to determine how long an investment will take to double given a fixed annual rate of interest.

By dividing 72 by the annual rate of interest we can obtain an estimate of how many years it will take for the initial investment to be double.

For example:  If $100 is invested at the rate of 6% ( 72/6 = 12 years ) It will take 12 years to be $200.

In this question Katelyn invests $50, $100 and $200 into three separate accounts with the same interest rate, Therefore, amount will double at the same time.

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.

not sure but it may be b, as i said i'm not sure.