Answer:
Step-by-step explanation:
Letter D. because any opposite number of a negative has to be a positive!
V = s^3= 343 = 7×7×7
S = 7 cm
You can add 4/9.
A simple trick is to look at the numerator and denominator separately, if they're both perfect squares then you're good (4, 2^2, check. 9, 3^2, check.)