Don Ho

Substitute t for 1995 in the function: P(t) = 310*1995^2+25474

The way I usually think of linear expression is if its 1st degree. Example of 1st degree: 2x+3y=30 Something that is not linear: x^2+3y=20 Notice how that's a second degree indicated by the ^2

4.42 - 2.25 = ?

What have you tried?

That looks right to me, and those two numbers are not divisible either so good job.