Which expression is greater than 1/2

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.

I’m really confused and need your assist me with this question i’ve never been taught

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.