Jo works in a cafe. She sells cups of tea and cups of coffee in the ratio 1:3.
On Monday Jo sold a Total of 244 cups of tea and cups of coffee. Jo thinks she must have sold more than 200 cups of coffee.

a. Is she correct?

b. Use estimation to show a check of your answer.

What are the possible rational zeros of [tex]f(x) = x^4+2x^3-3x^2-4x+18[/tex]

Find two numbers if their sum is 91 and the ratio is 6: 7?

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min