If the speed limit on a highway is 70 miles per hour, about how fast is this in miles per minute?

Mathematics

1 answer:

lara31 [8.8K]3 years ago

5 0

70mi/1hr x 1hr/60min x 1min/60sec= .0194/1sec

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Helga [31]

Answer:

Step-by-step explanation:

We need the formula for arc length (in radians) to solve this problem. The formula is:

$s=r \theta$

Where

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In this diagram, we can see that $\theta$ is beign intercepted by the big arc with measure 20 cm. So arc length, s, is 20

Also, if we look, we see that the radius is 5 cm, so r = 5

Now, we substitute into formula and find $\theta$ :

$s=r\theta\\20=5\theta\\\theta=\frac{20}{5}\\\theta=4$

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Rom4ik [11]

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3 years ago

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How do you find the surface area and volume of a cylinder

galina1969 [7]

<h2>Answer:</h2>

The surface area of a shape is the sum of the area of all of its faces. To find the area of a cylinder, you need to find the area of its bases and add that to the area of its outer wall. The formula for finding the area of a cylinder is A = 2πr2 + 2πrh.

<h2>Step-by-step explanation:</h2>

Surface area of a cylinder = 2πr 2 + 2πrh
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You need to know the radius and height to figure both the volume and surface area of a cylinder.
Answers for volume problems should always be in cubic units.
Answers for surface area problems should always be in square units.