Can someone please help me show your work

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.