Select whether each function is linear or nonlinear. Linear

Nonlinear

y=9(2x)

y=(5x+3)2

y=8x2

y=5x−3

y=3x2+2x−1

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

The classrooms are trying to raise $1,200.00 for charity. mrs. leblanc's class has raised 50%. mr. patel's class has raised $235.14 ms. warner's class has raised 1/3 as much as mrs. leblanc's class. how much more money is needed to reach the goal of $1,200.00?

What is the upper quartile in the box plot?