Anybody wanna help me plz

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?

The ratio of the ages (in years) of three children is 2: 4: 5. the sum of their ages is 33. what is the age of each child?

While on vacation in mexico jeremiah reads a distance marker that indicates he is 89 kilometers from juarez. if 1 mile is approximately 1.61 kilometers,how far is jeremiah from juarez to the newest tenth of a lie