3 years ago

Find the slope of the line

Mathematics

2 answers:

Luden [163]3 years ago

8 0

Answer:

Im pretty sure that the answer is C.

erastova [34]3 years ago

3 0

Answer:

B (-3)

Step-by-step explanation:

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VMariaS [17]

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3 years ago

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A ball rolls down an inclined plane such that the distance (in centimeters) that it rolls in t seconds is given by s(t) = 2t^3 +

IRISSAK [1]

The ball's velocity will be represented by the derivative of its distance function:

$s'(t)=6t^2+6t$

Now find the times $t$ for which this is equal to 30, i.e. solve

$6t^2+6t=30\implies t^2+t-5=0$

This has two solutions, $t=-\dfrac{1\pm\sqrt{21}}2$ , but only one is positive and falls in the interval $[0,3]$ . So the velocity reaches 30 cm/s when $t=-\dfrac{1-\sqrt{21}}2\approx1.79$ .