The rocket that carried the Curiosity Rover to Mars traveled at a speed of 21,000 miles per hour. What is this speed to the nearest mile per second? A. 6 miles per second
B. 350 miles per second
C. 1,260,000 miles per second
D. 75,600,000 miles per second

there are 60 minutes per hour and 60 seconds per minute

60x 60 = 3600 seconds her hour

21000/3600 = 5.83 miles per second

Step-by-step explanation:

without an explanation your answer is 75,600,000

but if u want a explanation than here:

You convert 21,000 mph into mps i.e. miles per second

so, you divide 21000 by 60x60 or 3600

⇒21000/3600

⇒5.83 mps

or

approximately 6 mps