What is the name of the command that estimates file space usage?

What is the name of the command that compares files line by line?

I understand that in order to test remotely I must have an external webcam positioned to the side so my hands, keyboard, profile, and computer monitor are all visible while testing. 

The amplitude of the function f(t) = −2 cos(4t) is −2.

A carousel is 90 feet in diameter. It takes passengers 9 minutes to complete 2 full revolutions. The linear speed of the carousel is 20π feet per minute.

What is 400 + 20 + 3?

Suppose that θ is in the 2nd quadrant, and that sin θ =. What is the value of cos θ?

In an ultrasound image, the femoral nerve lies _______ to the femoral artery.

Alternatives to a femoral nerve block are: (pick two)

A successful corporate strategy should create value through __________.