We want to compare averages. From the histogram we have we don't know the exact mean, but if we just assume the average in each bin is the midpoint of the bin we can make an estimate.
Supplier A has
mean = ( 22(64) + 27(66) + 26(68) + 15(70) + 10(72) )/(22+27+26+15+10)
mean = 6728/100 = 67.28 grams
Supplier B has mean 66.5
Answer: Choose Supplier A
(work shown above)
Answer:

Step-by-step explanation:
Since
, this would go behind
, and since
, this would go in front of 
Hence, the order of the numbers from least to greatest would be 
10 blocks = 6 min
30 blocks = 18 min
You can answer this because you know that 10 x 3 is 30, so if if the number of blocks tripled then the amount of time should triple as well because he's running at the same rate.
128 that is the answer yw
=7/(32+10)÷1/(36×36)×9/(6×9)
=1/6×1296×1/6
=9