How do I do standard deviation?

Venice mowed 6 lawns in 9 hours. what was her rate of mowing in hours per lawn

Which graph shows the graph for the quadratic function? y=2x^2+5x-3

46 + 1) + y = 5 (y - 1) + 9 Solve

If 94,500 cubic feet of water is to be funneled into a rectangular tank with a floor that measures 25 feet by 90 feet, about how many feet deep will the water be?

Which expression is equivalent to 15+80

The heavyweight weight class in high school wrestling is from no less than 195lb and a maximum 285 LB write two inequalities to represent this range

A shose box measures 15in. by 7in. by 4 an half

Write the equation or inequality : in order to take honors level math, Lisa must have an average of 85 on her math tests. Her scores so far are 85, 70, and 98. What is the minimum score Lisa needs on the fourth test to get into honors math class?

Convert 3/5 to its decimal form and round to the nearest tenth

K/2+1/2=3 Solve for K