The piston diameter of a certain hand pump is 0.6 inch. the manager determines that the diameters are normally distributed, with a mean of 0.6 inch and a standard deviation of 0.003 inch. after recalibrating the production machine, the manager randomly selects 26 pistons and determines that the standard deviation is 0.0026 inch. is there significant evidence for the manager to conclude that the standard deviation has decreased at the alpha equals 0.10 level of significance?

Bobby bought 1.12 pounds of turkey at a cost of 2.50 per pound. carla bought 1.4 pounds of turkey at a cost of 2.20 per pound. who spent more and by much?

The number of members f(x) in a local swimming club increased by 30% every year over a period of x years. the function below shows the relationship between f(x) and x: f(x) = 10(1.3)xwhich of the following graphs best represents the function? graph of f of x equals 1.3 multiplied by 10 to the power of x graph of exponential function going up from left to right in quadrant 1 through the point 0, 0 and continuing towards infinity graph of f of x equals 10 multiplied by 1.3 to the power of x graph of f of x equals 1.3 to the power of x

How would you find the height of points on the circle? the topic is trigonometry.