ethanhopewell1pc6ztd ethanhopewell1pc6ztd 28-07-2018 Mathematics contestada Which is the simplified form of r^-7 + s^-12? arrows to the left of -7 and -12 represent exponents, Options are, A. 1/r^7s^12 B. -r^7 - s^12 C. r^7/s^12 D.1/r^7 + 1/s^12