Astationery store sold 320 of two different types of pens for $190.55. one type of pen costs 25 cents and the other costs 80 cents. how many 80 cent pens were sold? what is the value of the 25 cent pens sold?

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =

Identify the number 127 as a rational or irrational. explain

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?