From a distance of 42 feet from the base of a building, the angle of elevation to the top of the building is 67º. estimate the
height of the building to the nearest foot.
a. 18 feet
c. 39 feet
b. 16 feet
d. 99 feet

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?

Prove that 16^4-2^13-4^5 is divisible by 11.