A lake is rising at 4 inches per hour. If the lake rises more than 36 inches, then it will cause flood damage. How long can the
1 answer:
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Answer:
Option b. sum of all areas of faces
Step-by-step explanation:
we know that
The surface area of the prism is equal to the area of its bases plus the area of its four rectangular lateral faces
so
where
B is the area of the base
P is the perimeter of the base
H is the height of the prism
therefore
sum of all areas of faces
a. The gradient is
b. The gradient at point P(1, 2) is
c. The derivative of at P in the direction of
is
It looks like
so that
Then