Sin a = 21/29, a lies in quadrant I and cos b = 5/13, b lies in quadrant I. Find cos(a+b).

Which of the following graphs represents the function f(x) = 2^x

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5