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3 years ago

7

Over which intereval is the graph of f(x)= -x^2+3x+8 increasing?

1 answer:

aalyn [17]3 years ago

6 0

Answer:

It is increasing when x < 1

Step-by-step explanation:

If you substitute x = 1 in the equation you get that y = 10 at that point which is the maximum point at which graph reaches in the y direction. As you can see, the slope of the derivative is increasing, which means that the slope of the tangent line is increasing before that point.

Hope this helps

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3 years ago

S(t)=sqrt3t+1 at t=2

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s(2) = √7

Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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3 years ago

The cost, in dollars, of producing x belts is given by C(x) = 634 + 18x - 0.071 x^2. Find the rate at which average cost is chan

o-na [289]

Answer:

When 324 belts have been produced, the average cost is changing at -28 dollars for each additional belt.

Step-by-step explanation:

The cost of producing x belts is given by:

$C(x) = 634 + 18x - 0.071x^{2}$

Find the rate at which average cost is changing when 324 belts have been produced.

This is $C'(324)$ . So

$C(x) = 634 + 18x - 0.071x^{2}$

$C'(x) = -0.142x + 18$

$C'(324) = -28$

So the correct answer is:

When 324 belts have been produced, the average cost is changing at -28 dollars for each additional belt.

5 0

4 years ago

Simplify <br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B105%7D%20" id="TexFormula1" title=" \sqrt{105} " alt=" \sqrt{105} "

Taya2010 [7]

Answer:

C. √105

Step-by-step explanation:

105 = 3·5·7 has no square factors, so its root cannot be simplified.

√105 simplified is √105.

3 0

3 years ago