What number between 30 and 40 has only one and itself as factors?

The numbers between 30 and 40 whose only factors are one and themselves, also called prime numbers, are 31 and 37.  :)

It is 31 and 37

Numbers that have only one and itself as a factor are called prime numbers.

$20.01

step-by-step explanation:

the sale price is (1.00 - 0.77)($87), or 0.23($87), or $20.01.