Okay i'm doing h.w. right now and i'm trying to solve these without having to look at my notes:

The angle elevation of the sun is 40 degrees. To the neaest foot, find the height of a tree whose shadow is 35 ft long.

35 x tan (40) = 29 degrees

A washington monument is 555 ft high If you are standing one quarter of a mile or 1320 ft, from the base of the monument, and looking to the top, find he angle of elevation to the nearest degree.

-1 tan (555/1320) = 2 degrees

A road is inclined at an angle of 5 degrees. After driving 5000 ft along this road, find the driver's increase in altitude. Round to the neares foot.

This one and the next one, i'm a bit lost at going about solving. Would I use sin for this?

A telephone pole is 55 ft tall. A guy wire 88 ft long is placed from the ground to the top of the pole. Find the distance between the wire and the pole to the nearest degree.