Answer:
b
Step-by-step explanation:
Time taken for the total workout = 15 + 30 + 45 = 90 minutes
Time taken for lifting weight : total time = 30 : 90
= 1 : 3
Commutative property of multiplication is two numbers being multiplied either way,example 1x2 = 2x1.
135° I think 1080( what the angles add up to) 1080÷8=135°