18. At Roasters Café, the cost of 3 cups of coffee and 6 donuts is $15, while the cost of 5 cups of coffee
and a dozen donuts is $28. Use these totals to find
the cost of one cup of coffee and the cost of one
donut.

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the given curves about y = 8.8y = x3, y = 0, x = 4use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the given curves about y = 8.8y = x3, y = 0, x = 4