699 is closet because as you subtract every number from 750, the smallest answer given is the closest to the number you started with.
3^(4x) = 3^(5 - x)
4x = 5 - x
4x + x = 5
5x = 5
x = 5/5 = 1
x = 1
-6.4 – 4(-2.8)
-6.4 – - 11.2 = 4.8
Your answer is B: 4.8
Answer:
the value is 2.2721803393 x 1400