It is: 8.5
85
85
The square root of 85 correct to the nearest tenth is 9.2
1/10 of 85 = 8.5
851/10 * 850= 0.1 * 850= 85
9.2
± 9.2
9.2
85.0 = 85
sqrt(85) = 9.219+ = 9.2 rounded
850 x 1/10 Cancel down by '10' 85 x 1/1 = 85 /1 = 85
8, 15, 24, 32, 85, 100 respectively