Attendances at a high school's basketball games were recorded and found to have a sample mean and variance of 470 and 16, respectively. Calculate x ± s,

x ± 2s,
and
x ± 3s.

Can someone me out here number 4 plz

Solving algebraic equations 2m+3=11

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? *