The grades on a history midterm at Santa Rita are roughly symmetric with p=76 and o = 3.0. Ben scored 71 on the exam.
Find the Z-score for Ben's exam grade. Round to two decimal places.

Louis wants to carpet the rectangular floor of his basement.the basement has an area of 864 square feet.the width of the basement is 2/3 it's length. what is the length of louis's basement

Which of the following parabolas opens down?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?