Answer:
6
Step-by-step explanation:
If she wants to go from 18, to 9, which is 1/2, then she’d have to cut the time in half as well. 12 divided by 2 is 6!
Hope this helped you!
RT=6.5
PV=7.3
a*sqrt(x+b) + c = d
or
a*√(x+b) + c = d