A group of students was asked, "How many hours did you watch television last week?" Here are their responses.
6, 16, 5, 16, 13, 12, 20
Find the mean number of hours for these students.
If necessary, round your answer to the nearest tenth.

1. what is the phythaforean theorem? 2.what do we use it for? 1.what is the distance formula ? 2.what do we use it for?

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 =

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?