Part a & b please

TA | Human-like Grading, Automated! (8%) Problem 7: A student hears a sound with a power of P = 38 p.W. At their distance from the source, the sound has intensity / = 0.71 W/m. A 50% Part (a) Assuming the eardrum is circular, what is the radius of their eardrum, in meters? 1 = 1 Grade Summary Deductions Potential 100 sinO cos tan( 7 8 9 HOME Submissions cotan() asin( acos() E Attempts remaining: 4 5 6 (83% per attempt) atan() acotan() sinho 2 3 detailed view cosh() tanh() cotanh() + 0 END O Degrees . Radians VO BACKSPACE CLEAR Submit Hint Feedback I give up! Hints: 0% deduction per hint. Hints remaining: 2 Feedback: 0% deduction per feedback. 4 50% Part (b) Another student stands in the exact same location, but receives 20% more power from the same source. What is the radius of the second student's eardrums