tylers mom purchased a saving bond for tyler. she put $5,000 in it for 8 years and earned 4% interest. How much interest did it earn

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°

Having a hard time understanding this question (see attachment).

Mike wants to make meatloaf. his recipe uses a total of 8 pounds of meat. if he uses a 3 to 1 ratio of beef to pork, how much pork will he use? enter your answer as a mixed number in simplest terms.