20% of Aussies have blue

Mathematics

1 answer:

notsponge [240]2 years ago

6 0

Answer:

Step-by-step explanation:

Step 1: 4 = 20% × Y

Step 2: 4 = 20/100 × Y

Multiplying both sides by 100 and dividing both sides of the equation by 20 we will arrive at:

Step 3: Y = 4 × 100/20

Step 4:Y = 4 × 100 ÷ 20

Step 5: Y = 20

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Please answer that for me i will mark brainliest If X was 30, y would be equal to what number?

Fed [463]

Answer:

We cannot solve this.

Step-by-step explanation:

There is no equation to plug x in.

For example,

x + 7 = y

If x = 30, 30 + 7 = 37

Hope this helps!

7 0

2 years ago

How can you use the formula for the volume of cylinder to remember the formula for the volume of a cone and the volume of a sphe

SSSSS [86.1K]

Answer: Choice A

The formula for the volume of a cone is 1/3 the volume of a cylinder. The volume of a sphere is 4/3 the volume of a cylinder, where the height of the cylinder is the same as the radius of the sphere

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Explanation:

As the first screenshot shows, the volume of a cone is 1/3 the volume of a sphere. The radius of each are the same. The height of each are the same as well.

The first screenshot also mentions "The volume of the half sphere is 2/3 the volume of the cylinder". The diagram shows the height of the cylinder (h) is equal to the radius of the half sphere. Based on this, the volume of a full sphere of radius r will be 4/3 times the volume of the cylinder with the same radius and height of 2r. You can think of having a spherical tennis ball inside a cylindrical can.

The first screenshot shows this when your teacher computed $2*\frac{2}{3}*\pi*r^2*r$ to get $\frac{4}{3}\pi*r^3$