Is 450cm more or less or equal to 45m

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

What are the solutions to the following equation? |m| = 8.5 the value of m is equal to 8.5 and because each distance from zero is 8.5.

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?