A nine-meter ladder leans against a building making an angle of with the ground. How far is the bottom of the ladder from the base of the building?

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250

Two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: what is the approximate distance, in feet, between the two poles? 6.93 feet 8.66 feet 12.32 feet 15.59 feet