The value of "a" is the following equation:

4a + 0.2a + 0.6a + 0.006a + 0.0006a + 0.00006a + ... = 7

What's the value of a? I really don't get it.

i dony know

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

12

step-by-step explanation: