What i use the pythagorean theorem for this problem?

What is best way to getting answer for my exam is

Which diagram best shows how fraction bars can be used to evaluate 1/2 divided by 1/4?

Gigi earned $65 for 5 hours of gardening. she earned $90 for 9 hours of office work. which statement correctly compares gigi’s earning per hour for gardening and office work? she earned $3 more per hour for office work than for gardening. she earned $4 more per hour for office work than for gardening. she earned $3 more per hour for gardening than for office work. she earned $4 more per hour for gardening than for office work.