Work out the percentage change when a price of £20 is increased to £22.

10% increase

Step-by-step explanation:

To find the percent change, divide the difference between the 2 prices by the original price:

2/20

= 0.1

So, the percent change was 10%

i think c. but don't trust it.

step-by-step explanation:

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere