7. Place an X in the table to show whether each set of side lengths describes a 30°-60°-90° triangle, a 45°-45°-90° triangle, or neither. 30°-60° 45°-45° -90° Neither -90° 3, 4, 5 2.5, 5, 5√3 2 3,3,3√2 7, 14,7√3

Show that there is no triangle for which a=4 feet, b=14 feet, and A=60.

If the angle of elevation to the sun is 74.3 when a flagpole casts a shadow of 22.5 feet, what is the height of the flagpole? a. 63.2 feet b. 79.5 feet c. 83.1 feet d. 80.0 feet

The imaginary number i has the property that i2 = ___________________ .