Answer:

Step-by-step explanation:
we know that
The surface area of the cone is given by the formula

where
r is the radius of the base
l is the slant height
we have

substitute


To find t<span>he relative maximum value of the function we need to find where the function has its first derivative equal to 0.
Its first derivative is -7*(2x)/(x^2+5)^2
</span>7*(2x)/(x^2+5)^2 =0 the numerator needs to be eqaul to 0
2x=0
x=0
g(0) = 7/5
The <span>relative maximum value is at the point (0, 7/5).</span>
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Answer:
The answer is C.
Step-by-step explanation:
The $13 he started off with is the y-intercept or the initial value, which is the point where x=0.
The x-intercept, or rate of change, is $8.50.
The slope intercept formula is y=mx+b, where m=8.5 and b=13.
The equation for this problem is y=8.5x+13.
So the answer is C