You are standing 164 feet away from the base of a building and your clinometer measures 21° when it's looking at the top of the building. (This angle is the one between the ground
and the top of the building). Please calculate the height of the building.

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

The formula to determine energy is e=1/2mv2? what is the formula solved for v?

Two farmers pay a total rent of $140 for a pasture. the first farmer placed $4 oxen in the pasture, and the second farmer placed $30 sheep in the pasture. the farmers split the rent based on the proportion of the pasture eaten by their own animals that month. how much should the first farmer pay, if 1 ox eats as much as 10 sheep in a month?