What does the cursive r thing mean
2 answers:
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Use a= 
r^2 (r represents your radius of 4 feet)
(4^2)
Answer = 16^2
Answer = 16
Answer:
13058.83 cubic inches
Step-by-step explanation:
Given that a rectangular box is having dimensions as 41x81 inches.
Let x be the side of square cut from all the four corners.
The open box made would have height as x and length 41-2x with width 81-2x
Volume =
Equate first derivative to 0
We get applicable root as x = 8.642
Max volume = 13058.83 cubic inches