The difference between the compound interest and simple interest on a certain sum at 10% per annum for 2 years is ₹157. Find the sum

Given: △abc, ab=15, bd=9 ad ⊥ bc , m∠c=30°. find: the perimeter of the triangle.

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

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?