solve the following 0 degrees is 9 of 1 equal to theta is it a more equal to 19 degrees a sign two theta equals to Cos 3 theta

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)