Find the exact values of sin a and cos a. write fractions in lowest terms. a right triangle abc is shown. leg ac has length 21, leg bc has length 28, and hypotenuse ab has length 35.

What is the sum of these mixed numbers 2 1/8 + 4 3/8

Astandard american eskimo dog has a mean weight of 30 pounds with a standard deviation of 2 pounds. assuming the weights of standard eskimo dogs are normally distributed, what range of weights would 99.7% of the dogs have? approximately 26–34 pounds approximately 24–36 pounds approximately 28–32 pounds approximately 29–31 pounds

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9