When x equals 3 and y equals 5 by how much does the value of 3x squared minus 2y exceed the value of 2x squared minus 3y

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.

Huong is organizing paperback and hardback books for her club's used book sale. the number of paperbacks is 12 less than three times the number of hardbacks. huong had 162 paperbacks. how many hardback books were there?

The radius of the sphere is 10 units .what is the approximate volume of the sphere use π=3.14