No need for explanation, just please just check my answers for number 3 and 15! Thanks.

3. Two triangles can be formed with the given information. Use the Law of Sines to solve the triangles. A = 560, a = 16, b = 17 (5 points) B = 28.30, C = 95.70, c = 13.3; B = 151.70, C = 84.30, c = 13.3 B = 61.70, C = 62.30, c = 17.1; B = 118.30, C = 5.70, c = 1.9 B = 28.30, C = 95.70, c = 19.2; B = 151.70, C = 84.30, c = 19.2 B = 61.70, C = 62.30, c = 15; B = 118.30, C = 5.70, c = 1515. Write the sum using summation notation, assuming the suggested pattern continues. 2 - 8+ 32 - 128 + ... (5 points) O $ 2 . 40+1 n-D O [ 2(4)0-1 n-D O [ 2(-4)" n-D O $ 2 . 40 n-D