1. A cafeteria is said to dispense 80 ml. of fluid per serving with a standard deviation of 2.5. A student believes that the average amount of fluid is not 80 ml. The student takes 40 samples and measures an average amount to be 78 ml. State the null and alternative hypotheses.
Decide whether or not to reject the null showing all of your work

Someone answer asap for ! a ball is rolled down a ramp. the height, f(x), in meters, of the ball x seconds after it is released is modeled by the function f(x) = x²- 10x + 25 for all values of x from 0 to 5. which statement about the ball is true? a. the maximum height of the ball is 5 meters b. the height of the ball increases from 0 to 5 meters above the ground. c. the ball has traveled 5 meters when it reaches the bottom of the ramp. d. the ball has been traveling for 5 seconds when it reaches the bottom of the ramp