Round 956 to the nearest 5

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *

The equation sin(25)= 9/c can be used to find the length. what is the length of ab? round to the nearest tenth