The rule I(p) = 400p - 20p^2 can be used to estimate the income (I) from ticket sales on based on the ticket price (p)

a. Use factoring or the quadratic formula to identify the zeros of the function.

What situation is an example of an observational study

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)

The graph shows the decibel measure for sounds depending on how many times as intense they are as the threshold of sound. noise in a quiet room is 500 times as intense as the threshold of sound. what is the decibel measurement for the quiet room? 20 decibels28 decibels200 decibels280 decibels