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IgorLugansk [536]

3 years ago

14

Joey made 300 greeting cards. He sold 40% of the cards, gave 85% of the remaining cards to him friends, and kept the rest of the

cards for himself. How many greeting did he keep for himself?

1 answer:

Sedbober [7]3 years ago

4 0

I believe he kept 18 cards.

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If f(x) = x^3 find df/dx | x= -5

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Step-by-step explanation:

So we have:

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Take the derivative of the function. Use the power rule, which states that:

$\frac{d}{dx}(x^n)=nx^{n-1}$

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Use power rule:

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Now, substitute in -5:

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$=3(25)=75$

So our answer is 75.

This means that the slope of the line tangent to the point (-5,-125) on the graph x^3 is 75.

And we're done!

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