What is the solution set for the open sentence with the given replacement set? x^2 + 12 =8x {2,4,5,8} a 2 b 4 c 5 d 8

a. 2

Step-by-step explanation:

Given equation,

Subtract 8x on both sides,

By middle term splitting,

By Zero product property,

x - 2  = 0 or x - 6 = 0

x = 2 or x = 6

Hence, the correct option is 'a'

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)