I’m not sure about the estimates but the overall answers should be correct
A) 27, 81
b) -30,-15
c) -3, 1
d) -320, 1280
X = 3 y = 4
so answer is 4
Answer:
m
Step-by-step explanation:
Let
Bas length of box=b
Height of box=h
Material used in constructing of box=36 square m
We have to find the height h and base length b of the box to maximize the volume of box.
Surface area of box=




Volume of box, V=
Substitute the values


Differentiate w. r.t b







The negative value of b is not possible because length cannot be negative.
Again differentiate w.r.t b

At

Hence, the volume of box is maximum at
.




m
Question 1 answer: 5/3 miles per hour
reason: 1/3 divided by 1/5