A 14 gram sample of a substance that's used to preserve fruit and vegetables has a k-value of 0.1092. Find the substance's half-
life, in days. Round your answer to the nearest tenth. N=Noe^-kt
1 answer:
Answer:
t = 6.3
Step-by-step explanation:
N=Noe^(-kt)
No = 14 grams
k = .1092
We want to find t when N = 7 or 1/2 of 14
N=Noe^(-kt)
7 = 14 e ^ (-.1092t)
Divide each side by 14
1/2 = e ^ (-.1092t)
take the natural log of each side
ln (1/2) = ln e ^ (-.1092t)
ln (1/2) = -.1092t
Divide each side by -.1092
ln (1/2)/ -.1092 = t
t≈6.3475
Rounding to the nearest tenth
t = 6.3
You might be interested in
Answer: D the difference of z and y must be 1/2x
Step-by-step explanation:
<span>- 8x</span>³ <span>- 2x</span>² <span>- 12x - 3 = 2x</span>²(-4x-1) + 3(-4x-1) = (-4x - 1)(2x² + 3)
Answer: C, 420
Step-by-step explanation:
The first positive even numbers are from 2 to 40, so the sum is equal to the number of terms, times the number of terms plus one (20*21 = 420)
the sum is 420
Answer:
c-24
a-156
Step-by-step explanation:
a=180-24( angles on s straight line)=156
c= 24 opposite angles
Answer:12
Step-by-step explanation:
divide 24 by 2
