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3 years ago

9

Brian counted 15 red cars and 20 blue cars in the parking lot. If the number of red cars stays the same, how many more blue cars

would need to be added so the ratio of red cars to blue cars is 1 to 2?

1 answer:

Phoenix [80]3 years ago

8 0

10 more blue cars for the ratio to be 1 to 2 because 15/15 is 1 and 30/15 is 2 so it 1 to 2

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A scoop of ice cream has 1.5 inch radius. How talk should the cream cone of the same radius be in order to contain all of the ic

MAVERICK [17]

Answer:

The cream cone should be <u>6 inches</u>.

Step-by-step explanation:

Given:

A scoop of ice cream has 1.5 inch radius.

Now, to find the height of the cream cone.

So, we need to get the volume of scoop by putting formula:

Radius (r) = 1.5 inch.

Using the value π = 3.14.

$Volume=\frac{4}{3} \pi r^3$

$Volume=\frac{4}{3}\times 3.14\times 1.5^3\\\\Volume=\frac{4}{3}\times 3.14\times 3.375\\\\Volume=14.13\ inches^3.$

<em>Thus, the volume of the ice cream scoop is 14.13 cubic inches.</em>

<em>So, to put all of the ice cream inside the cone.</em>

<em>We take the cream cone volume as the scoop volume.</em>

Let the height of cone be $h.$

<em>As, given radius is same.</em>

Now, to get the height of the cream cone we put formula of volume:

$Volume=\pi r^2\frac{h}{3}$

$14.13=3.14 \times (1.5)^2\times \frac{h}{3}\\\\14.13=3.14\times 2.25\times \frac{h}{3}$

<em>Multiplying both sides by 3 we get:</em>

<em /> $42.39=3.14\times 2.25\times h\\\\42.39=7.065\times h$ <em />

<em>Dividing both sides by 7.065 we get:</em>

$6=h$

$h=6\ inches.$

<u><em>Hence, the height of the cone = 6 inches.</em></u>

Therefore, the cream cone should be 6 inches.

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1. A jet travelled 640 miles in 2.5 hours. How far does it travel in 1 hour?

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Answer:

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Step-by-step explanation:

1.) ( 256 * 2.4 = 640 )

2.) 250 / 20 = 2.5

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3 years ago

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