The smallest possible measure of angle h is 90 degrees. Since f and g are complementary angles ( add up to 90 degrees), the h has to at minimum be 90 degrees to equal 180 degrees (supplementary angles).
C would be 49 degrees bc a triangles angles have a sum of 180 so 72+59+X= 180
Tje answer is A . 2.76 x 10^8 m/h
It’s traveling at 511 kilometers per hour