Answer:
1 and 10
Step-by-step explanation:
Your answer is C. 2000 ft^2/h.
15 is coefficient, a is a variable, 2 and -7 are like terms, 15a is a term and 2 and 7 are constants.
Answer:

Step-by-step explanation:

Differentiate:

Substitute
into
:

Therefore, 68 is the gradient of the tangent line at x=7:

when
, 

