A teacher spends hour grading of a student's essay. At this rate, how long does it take the teacher to grade the student's entire essay?

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2

Over the last 4 seconds, a snail has traveled 4/9 of an inch. if the snail traveled the same distance each second, how far did it travel each second?