Answer:
Try to understand by substitute a number in a and n.
Step-by-step explanation:
For example,
a=2, n=1
a^n= 2^1= 2
= 0.5
2^(-1)=0.5
Answer: A =a2
The answer is b.
T = (m × 20) + 25
(2.5 × 20) + 25 = 75
<u>75 minutes</u>
110 - 25 = 85
85 ÷ 20 = 4.25
<u>4.25 kilograms</u>