The question is biased towards a response to the use of free weights ( it called the machines easy and the free weights hard)

The sample is not biased ( it was a random survey)

**Step-by-step explanation:**

I think it is 10x but there are no options tho

**Answer: It's 9!**

**Step-by-step explanation: Given W=12,**

**0.75 times 12= 9!**

**Answer:**

81.7cm is the length left behind

**Step-by-step explanation:**

83 -1.3 =81.7