A dolphin jumps out of the water. The quadratic function h(t) = -16t^2 + 20t models the dolphin's height above the water in feet after t seconds. When does the dolphin reach it maximum height out of the water? what is the maximum height? how long is the dolphin out of the water?

13

step-by-step explanation:

divide the cost of the total of sodas you bought by the cost of one soda, for example:

$24.57 divided by $1.89 is 13 which means you bought 13 sodas

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

answer: 4 (:

step-by-step explanation: