The counting numbers are written one after another without any spaces: 1234567891011121314151617181920… . What digit is in the 2020th position?

7

Step-by-step explanation:

One-digit and two-digit numbers occupy  9 + 2*90 = 189  positions.

The amount of the rest positions from 190-th  till  2020-th  is  2020 - 189 = 1831.

The number of the three-digit numbers occupying these 1831 positions is  1831%2F3 = 610.33.

It means that the positions from  190 till 2019  are occupied by the three-digit numbers

   100, 101, 102, . . . , 100+610-1 = 709.

Hence, the digit in 2020 position is  "7",  the first digit of the number  710

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