The intersection of two planes can be a line segment true or false

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Colby and jaquan are growing bacteria in an experiment in a laboratory. colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. jaquan starts with 80 of a different type of bacteria that doubles every 3 hours. let x equal number of days. colbys experiment follows the model: a.) y=50*2^x b.) y=50*2^8x c.) y=50*2^12x jaquans experiment follows the model: a.)80*2^x b.)80*2^8x c.)80*2^12x

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2