Factor Quadratic equation 2k^2+9k+9

k =(9+√153)/4=(9+3√ 17 )/4= 5.342

or:

k =(9-√153)/4=(9-3√ 17 )/4= -0.842

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)