B) Share 31.6 kg in the ratio 7:1

Can someone with this one pre-calc question? the finishing time for a runner completing the 200-meter dash is affected by the tail-wind speed, s. the change, t, in a runner's performance is modeled by the function shown below: t= 0.0119s^2 - 0.308s - 0.0003 predict the change in a runner's finishing time with a wind speed of 3 meters/second. note: a negative answer means the runner finishes with a lower time. round to the nearest hundredth.

Factor -8x3-2x2-12x-3 by grouping what is the resulting expression?

What is always true about a positive integer raised to a negative odd power?