The compound interest formula is where
is the principal,
is the ending amount,
is the annual interest rate,
is the number of compounding periods, and
is the number of years. Billy invested
in a savings account paying
interest, compounded monthly. How much will Billy have after
years?

The compound interest formula is
where
is the principal,
is the ending amount,
is the annual interest rate,
is the number of compounding periods, and
is the number of years. Billy invested
in a savings account paying
interest, compounded monthly. How much will Billy have after
years?

the answer is b

$54.99

step-by-step explanation:

$54.99 includes 500 min. if she does not exceed 500 min then her bill is $54.99

unless you made a typo, the answers are both a and c.

step-by-step explanation:

1.5/3 is .5 whereas 3/9 is .3333333 not proportional

22/33 is .66666 and 4/6 is also .66666 proportional

2/4 is .5 whereas 142/213 is .66666 not proportional

14/7 is 2 and 7/3.5 is also 2 proportional

you could've also checked it by doing this simple division:

if the larger fraction divides with the smaller fraction to equal 1, it is proportional. so let me show you what i mean:

when i divide 22/33 by 4/6 i get 1, so we know it is proportional, and it is the same with 14/7 and 7/3.5. now if i divide 3/9 by 1.5/3 i get .66666 so therefore we know it is not proportional.

there are many ways to do this so i wanted to show you some possible ways.