Plane P contains four distinct lines L, lz, ls, and 4. Suppose l, ll, la 1 ly, and l l 1. How are l, and related? Choose the correct answer below.
4 is perpendicular to L, because li is parallel to l, and 13 is parallel to Ls.
B
4 is parallel to l, because l is perpendicular to l; and 13 is parallel to le.
is perpendicular to l, because li is perpendicular to lz and lz is parallel to lo.
D
4 is parallel tol, because li is parallel to lz and lz is parallel to La

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.