Which function models exponential decay? Select all that apply. A f(x) = 150 (0.84)2+3 – 7
B f(x) = 150 (1 + 0.16)*-3 – 7
f (x) = 150 (1 – 0.16)2-3 + 7
D f(x) = 150 (1.16)2+3 +7

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)

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

e2020 got it right

0.6, 3/5, and 6% are the 3 same portion.

but, when they're all changed to a decimal they would equal to 0.6.

hope this , good luck!