Answer:

Step-by-step explanation:
Square root of 9 is 3
20 is 4.472135955
27 is 5.19615242271
4.5 is intantly wrong because it is rational.
Answer:
Step-by-step explanation:
We are asked to find 7 is what percent to 30.
We will use proportions to solve our given problem.
Let us assume that 7 is n% of 30. So we can set a proportion as:

Let us solve for n.




Therefore, 7 is
of 30.
Answer:
12
Step-by-step explanation:
1
2
3
4
5
6
7
8
9
10
11
12
1+2+3+4+5+6+7+8+9+10+11+12=78
2/8 of an hour is 15,and 2/6 of an hour is 20 minutes. 20-15 is 5 minutes