Which equation describes a line perpendicular to line R that passes through the point (3, –6)?

A. x – 3y = 21
B.3x + y = 3
C.3x – y = 15
D.3x – y = 3

the correct answer is the second option

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

111

step-by-step explanation: