What’s the answer for question B?

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

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?

How do you write 0.5% as a fraction