Andre and Lin are 12 miles apart on a path when they start moving towards each other. Andre runs at a constant speed of 5 miles per hour, and Lin walks at a constant speed of 3 miles per hour. How long does it take them to meet?

$12. that is my answer.

i belive those are the ones that are under 90 degreese.

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)