Answer:

Step-by-step explanation:
1) rewrite 60 as it's prime factors.

2) group the smae prime factors into pairs.

3) Rewrite each pair in exponent form.

4) use this role:


5) Simplify.

So, therefor, the answer is option 1.
Answer:
5.25ft
Step-by-step explanation:
10.5ft÷42=0.25ft per inch
then 0.25(per inch) multiplied by 21 will give you 5.25ft which is your answer
Answer: JW.org is where you can find your answers.