Simple...
you have:
Dividing-->>
0.23076923
But, remember, you're rounding to the nearest hundreth...
0.23Thus, your answer.
click on picture, sorry if it's hard to read, but my phone messed up the typing
1,250 feet. 2 kilometers to meters is 2000 meters. subtract 750 from that and your answer is 1250 feet.
Just add the exponents. The base should stay the same