What is the units digit of 9^3-7?
Choose the correct choice from the following answers:
A) 1 B) 3 C) 5 D) 2 E) 4
The unit's digit of 9^3 = 9   9-7= 
<gadget id="calculator">9-7</gadget>
<output>2</output>
2   Answer 2
<result>D</result>
What is the units digit of 9^3-7?