The closest distance between Earth and Mars is approximately 3.39 × 10^7 miles. The fastest rocker leaving Eartg travels at an a

verage speed of approximately 3.6 × 10^4 miles per hour. At that rate, which expression could be used to determine the approximate number of hours it would take the rocket to travel that distance?
A. (3.39 × 10^7) - (3.6 × 10^4)
B. (3.6 × 10^4) - (3.39 × 10^7)
C. (3.39 × 10^7) ÷ (3.6 × 10^4)
D. (3.6 × 10^4) ÷ (3.39 × 10^7)​

Which system of equations has no solutions
A. 3x + 4y = 5
6x + 8y = 10

B. 7x - 2y = 9
7x - 2y = 13

C. 2x - y = -11
-2x + y = 11

D. 3x + 6y = 1
x + y = 0