Answer:
B= 70.53
Step-by-step explanation:
Since this is a right triangle, we can use trig functions
cos theta = adj / hypotenuse
cos B = 3/9
Taking the inverse cos of each side
cos^-1 cos B = cos ^-1 (1/3)
B =70.52877937
Rounding to the nearest hundredth
B= 70.53
