If shirley put $4000 in the bank at 6 percent interest compounded annually, how much would she have at the end of 2 years?

$4480

Step-by-step explanation:

From the question statement, we observe that

Principal=$4000,    Interest rate=6 percent=.06  , No. of years=2 years

Interest= Principal×Interest rate×No. of years

Interest=4000×.06×2

Interest=$480

total= Interest+Principal

total= $4000+$480

total =$4480

She would have $4480 at the end of two years.

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!