How many different 7 digit phone numbers are possible if numbers can be repeated

Hello from MrBillDoesMath!

10^7 choices

Discussion:

The first digit can be any of 10 choices :  (0,1,2,3,4,5,6,7,8,9)

The second digit can also be any of the same 10 choices as numbers can be repeated.

So for a seven digit number there are a total of

10 * 10 * 10 * 10 * 10 * 10 * 10                ( 7 times)

= 10^7 numbers

Thank you,

MrB

75

step-by-step explanation:

you do x-29=46 (the number of cantaloupes sold)

in order to find x, you have to find what minus 29 equals 46, meaning you'd have to add 29 to 46.

29+46=75

if you replace x with 75, the equation looks like:

75-29=46

x=75

v = 1/3 a^2h

step-by-step explanation:

if the height is 57.7cm and the height of the slant edge is 18.2cm, then the volume is 1/3 a^2h.