What is the y-coordinate of the following quadratic function?

y=x^2 – 2x + 7

What is the y intercept of f(x)=(1/2)^x?

What is the circumference of the pie

Aparking garage charges $1.12 for the first hour and 0.50 for each additional hour. what is the maximum length of time tom can park in the garage if we wishes to play no more than $5.62