Caroline needs to find 15% of $128, but she doesn’t have a calculator. thoroughly explain how she can do this mentally, detailing each step. give the final answer.

$19.20

Step-by-step explanation:Break the 15% into easy to think in the head factors, 10% and 5%.  Ten percent of $128 is $12.8.  Half of that is 5%, $6.40.  Add them together for your 15% and you get  $19.20.

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer