A boy earned $21.75 for babysitting. He spent of his earnings to buy lunch.
How much money does the boy spend on his lunch?

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?

I’m confused on how to work the pie charts

Which is the focus of a parabola with equation y2=4x