Answer: good for you
Step-by-step explanation:

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


If your question is 25 dollars for the shirt then the ansewer is $26.5 hope this helps.
Answer:
D I think
Step-by-step explanation: