14% of 980?
15 is what percent of 50?
38% of $785?
78 is 20% of what number?
99 1/2% of 6,000?
12 1/5% of $25,000?
12 is 75% of what number?
30 is what % of 20?
1 1/4% of 20,000?

Ahovercraft takes off from a platform. its height (in meters), xx seconds after takeoff, is modeled by: h(x)=-2x^2+20x+48h(x)=−2x 2 +20x+48 what is the maximum height that the hovercraft will reach?