Mary gets a $15 allowance each week. She also earns extra money by washing cars. She earns $5 for every car she washes. Each week, Mary sets aside $4 for her movie streaming service and keeps $10 for spending money. She also has a goal to save $16 a week for college. How many cars does Mary need to wash each week to reach her goal?

At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 cubic feet per minute. the diameter of the base of the cone is approximately three times the altitude. at what rate is the height of the pile changing when the pile is 12 feet high? (hint: the formula for the volume of a cone is v = 1 3 πr2h.)

Can somebody me out with this question

Type the correct answer in each box. use numerals instead of words. if necessary, use / fir the fraction bar(s). the graph represents the piecewise function: h