2 years ago

Need help (easy 20 points)

Mathematics

1 answer:

schepotkina [342]2 years ago

4 0

Answer: well I Might be wrong but all I have to do is look it up.

Step-by-step explanation:

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Write 7/40 as a percent.

Archy [21]

Answer:

17.5%

Convert fraction (ratio) 7 / 40 Answer: 17.5%

Step-by-step explanation:

Brainliest?

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3 years ago

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22 percent of what number is 24.2

anastassius [24]

22% of what number is 24.2

0.22x = 24.2
x = 24.2 / 0.22
x = 110 <===

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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 $t=-\dfrac{1-\sqrt{21}}2\approx1.79$ .