Question

Evaluate r2 for for = 3.14 and r = 3.

Answer 1

//I take it you're trying to find the area or circumference of a circle, so I'll do both.


`\pi`
`r^(2)` = area
3.14 *
`3^(2)` = 28.26 (2 d.p)

2
`\pi`r = circumfrence
2 * 3.14 * 3 = 18.84 (2 d.p)

Answer 2

For r= 3.14: r^2 = 9.8596

For r = 3: r^2 = 9

Explanation:

If we have two values of r, r= 3.14 and r = 3, we have to substitute in the expression r^2 to solve, to solve a square number you have to multiply the number for itself:

r = 3.14:

3.14^2 = 3.14*3.14 = 9.8596

r = 3

3^2 = 9