Step-by-step explanation:

Answer:the first one
Step-by-step explanation:
i did the math
It will be: D
-3 x -5/2 = 15/2, which is 7 1/2
Let's look at the multiplication exponent rule.

Meaning that the exponents will add together when the same base is multiplied.

Hope this helps.
頑張って!
Answer:
C) 40% of 84
Step-by-step explanation
i don't know how to explain it T~T