1, find the sum of the first 78 terms

10+16+22+28...

2. A toy rocket is shot vertically into the air from a launching pad 44 feet above the ground with an initial velocity of 144144 feet per second. The height h, in feet, of the rocket above the ground at t seconds after launch is given by the function h left parenthesis t right parenthesis equals negative 16 t squared plus 144 t plus 4h(t)=16t2+144t+4. How long will it take the rocket to reach its maximum height? What is the maximum height?

The rocket reaches its maximum height at _______________second(s) after launch.

The maximum height reached by the object is _____________________feet.