A rocket is launched from the top of a 30 foot cliff with an initial velocity of 160 feet per second. The height, h, of the rocket after t seconds is given by the equation h = - 16t2 + 160t + 30. How long after the rocket is launched will it be 10 feet from the ground?​

What is the value of this expression when b= 5 6 (2b-4)

Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.