Solving+Quadratics+part+I

Homework (BASHFORD'S CLASS - SEE BELOW!): 
The equation //h //( //t //) = 4.9 //t //2 + 40 //t //gives the height in meters at //t //seconds of a projectile shot vertically into the air. a. What is the height at 2 seconds? b. Use a graph or table to find the time(s) when the height is 75 meters. Give answers to the nearest hundredth of a second. c. At what time(s) is the height 0 meters? Give answers to the nearest hundredth of a second. d. <span style="color: rgb(35,31,32); font-family: Minion-Regular;">What is a realistic domain for //<span style="color: rgb(35,31,32); font-family: Minion-Italic;">t //<span style="color: rgb(35,31,32); font-family: Minion-Regular;">?

Teacher Notes:
[|Solving quadratic equations2.notebook]

BASHFORD'S HOMEWORK Finish the investigation through step #5