(8%) Problem 4: The time delay between the transmission and the arrival of the reflected wave of an ultrasound signal traveling through a region of someone's fat tissue was 0.14 ms. Assume that the speed of sound through human tissues is 1540 m/s. At what depth, in centimeters, did this reflection occur? x = || cm sin() cos() cotan() asin() atan() acotan() cosh() tan() 1 acos() E M sinh() tanh() cotanh() Degrees Radians Submit Hint * Feedback + 0 VO BACKSPACE 7 8 9 4 5 6 1 2 3 - DEL I give up! HOME END CLEAR ing so Grade Summary Deductions Potential 1 2 0% 100% Submissions Attempts remaining: 8 (0% per attempt) detailed view 0% 0%