Your correct! The answer is 4 because it’s a 45-45-90 triangle
Answer:
-3 and 1/3, -3, -1, -1/2(-0.5), 0, 1, 4, 21/5(4.2), 5, lastly 6
50mph, 60 minutes, half both 25 and 30
A-B should be 30 minutes
B-C should probably be 20-25 personally I'd go with 25
so 55?

The sand we need to fill the cylinders is equal to the total volume of the six cylindrical posts .
Given terms ( common for each cylinder ) :
- height (h) = 4 ft
- radius. (r) = 0.5 ft

Since volume of each cylinder is equal, so total volume of six cylindrical post :
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Well.. instead of k he could have put 7. He should know that x and y are cut in half of their original values.
Hope I helped you!