Answer: 115 - (-30) = 115 + 30 = 145 degrees change
Step-by-step explanation:
A. 32/4=8
B. Square root of 9 = 3
Answer:
Decreased by 20%.
16 lbs is 80% of 20 lbs.
Step-by-step explanation:

y × 20 = 16 × 100
20y = 1600
20y ÷ 20 = 1600 ÷ 20
y = 80
100% - 80% = 20%