The diagram below shows a cumulative frequency histogram of the students’ test scores in Ms. Widow’s algebra class. Determine the total number of students in the class. Determine how many students scored higher than 70. State which ten-point interval contains the median. State which two ten-point intervals contain the same frequency.

Question

anonymous · Answer

The shaded region between the graphs of y=-2x^2+20 and y=3x-15 is displayed below in orange. 
The shaded region lies between x= ?and x= ?

A typical rectangle is shown in the diagram located at position x. What is the area of this rectangle, in terms of x?
Delta x=

Now find the total area of the orange shaded region. Write your answer in exact form.
A=