Of a total of 100 buses operated within a particular town, 48 usually run on time and 36 of these buses are owned by Jerry. Of the 52 buses that usually run behind schedule, only 7 are owned by Jerry. The probability that a bus is owned by Jerry, given that it runs on time, is %. The probability that a bus is owned by Jerry, given that it runs late, is %.

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?