Help please!

This question is so confusing...

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

From the top of a tree a bird looks down on a field mouse at an angle of depression of 50°. if the field mouse is 40 meters from the base of the tree, find the vertical distance from the ground to the bird's eyes.