What is the index of the following Radical
Square root of Q

 the radical expression above, n is the index, x is the radicand, and the math symbol indicating the taking of roots is the radical. The index tells what root is being taken. If there is no index written, it is understood to be 2, a square root.

Step-by-step explanation:

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24