If the standard deviation of shear strength measurements for spot welds is 9.9 pounds per square inch (psi) what is the minimum number of test welds that should be sampled if we want the sample mean to be within 1.3 psi of the true mean with probability approximately 0.99? (Round your answer up to the nearest whole number: )test welds

Concrete Mix Ratios For 3000, 3500, 4000, and 4500 psi concrete

MODELING WITH MATHEMATICS When you stand on snow, the average pressure P (in pounds per square inch) that you exert on the snow varies inversely with the total area A (in square inches) of the soles of your footwear. Suppose the pressure is 0.43 pound per square inch when you wear the snowshoes shown. Write an equation that gives P as a function of A. Then find the pressure when you wear the boots shown. | Numerade