The answer is number 4. Cube
Answer : $22.50
Explanation: .30•25=7.5 30-7.5=22.5
Step-by-step explanation:
"identity" means an operation that does nothing.
For adding numbers, adding 0 changes nothing, so 0 is the identity for addition.
For multiplication, multiplying by 1 changes nothing, so 1 is the identity for multiplication.