Four pounds of apple cost $5. Eight pounds of apples cost $10. Of the total cost of apples , y varies directly with the number of pounds of apples purchased, x, what is the cost of 6 pounds of apples? Round your answer to the nearest hundredth. ($0.80) ($1.25) ($4.80) ($7.50)

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two