Aprinting company charges a fixed rate to set up the printing press, plus a cost of $3.50 for every 100 copies. if 800 copies cost $6400, how much will it cost to print 1500 copies?

Jack lives on a farm and has a large backyard. the area of his rectangular backyard is of a square mile. if the width of the yard is of a mile, what fraction of a mile is the length of the rectangular backyard?

Can someone me out here number 4 plz

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6