It works because even if the numbers are broken apart, you are still multiplying the numbers by their values, it's only different because once broken apart, it's in expanded form instead of standard form. It also makes multiplication easier since you don't have to deal with such large numbers.
The root

can be converted into the power

. Therefore we can rewrite the problem as

and then follow the exponent rules about a power to a power, multiplying 1/2 and 3/4 together.
Thus the problem becomes

, which then can be turned into
![\sqrt[8]{10} ^{3x}](https://tex.z-dn.net/?f=%20%5Csqrt%5B8%5D%7B10%7D%20%5E%7B3x%7D)
, making the last option our answer.
Answer:
Step-by-step explanation:
10=25% of a number
10=1/4 of a number
10=x*1/4
40=x*1=x
the number is 40.
Answer:
7
Step-by-step explanation:
To solve this use the expression PEMDAS
So first we do what is in parenthesis
Then . .
√41 = 6.4 rounded to the tenth
round to the nearest whole number = 7