Thad 21 different toys when I was little, and my mom asked me
to give 5 of my toys to my younger brother. In how many ways
can I choose the 5 toys?

20349.

Step-by-step explanation:

It is given that,

Total number of toys = 21

Number of toys to be selected = 5

Total number of ways to select 5 toys from 21 toys is

Therefore, the required ways are 20349.

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

step-by-step explanation:

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.