HELP! Two angles of a triangle are 56 and 42'. The side opposite the first angle is 12 cm. Find the side opposite the second angle.

A) 14.86
B)15.187
C)19.563
D)9.685

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?