If you earned $32,000 this year at your job and know you will receive a 4% raise every year, how much will your annual income be in 5 years?

$38,400

Step-by-step explanation:

Find 4 percent of $32,000, which is 1280.

Multiply 1280 by 5 as for 5 years which will become 6400 and then add 32,000 and 6400 and you get your answer which is $38,400

You're explanation for number one also works for numbers 2 and three. They just want you to understand that it can work with any number. So, for instance, number two states that (xyz)^4=x^4 * y^4 * z^4, and this is true because the fourth power is distributed between x, y and z. [(x*x*x*x)(y*y*y*y)(z*z*z*z)]