Help please I’ll mark branliest

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

Here is my question! jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.