1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dolphi86 [110]
4 years ago
11

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
Mathematics
1 answer:
nignag [31]4 years ago
5 0

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
Find (x - 6)2
Sever21 [200]
Its 4-6=2 its easy because just keep useing numbers until the become two


7 0
3 years ago
Read 2 more answers
Which equation, when solved, results in a different value of x than the other three?
kicyunya [14]
I would have to say -7(1/8)x-4/3=20.


The first and the second one both result in
-23 5/7

The last one results in -24 8/21

but the third one is -22 3/8.

So your answer is either the third of the last one. I assumed the third because, it is lower than all others and the first two are closer to 24 than they are to 22. It’s your choice on how to judge it.
5 0
3 years ago
PLEASE HELP
ruslelena [56]

Answer:

Rosaria purchased 50 bracelets and 70 necklaces

Step-by-step explanation:

Let the number of bracelets be b and the number of necklaces be n

b + n = 120 •••••(i)

Secondly;

10b + 11n = 1270 ••••(ii)

Total cost of b bracelets at 10 per 1 is 10b

Total cost of n bracelets at 11 per 1 is 11n

Adding both gives 1270

From i, b = 120-n

Substitute this into ii

10(120-n) + 11n = 1270

1200 - 10n + 11n = 1270

n = 1270-1200

n = 70

b = 120-n

b = 120-70

b = 50

4 0
3 years ago
Which best explains whether a triangle with side lengths 5 cm, 13 cm, and 12 cm, is a right triangle?
Llana [10]
The Pythagorean Proposition can help you explain this:
{a}^{2}  =  {b}^{2}  +  {c}^{2}  \\ {13}^{2}  =  {5}^{2}  +  {12}^{2}  \\ 169 = 25 + 144
7 0
3 years ago
Read 2 more answers
Whats 2+2+2+2+2+2+2+2+2+2
eimsori [14]

Answer:

20

Step-by-step explanation:

there are 10 2s

2×10 =20

7 0
3 years ago
Read 2 more answers
Other questions:
  • Kirsten and molly are on a 3-day bike ride.The entire route is 156 miles. On the first day,they bilked 64miles. On the second da
    9·1 answer
  • Put these numbers in order from least to greatest 35%, 1/3, 9/2, 2/3, 3/5, 0.05, -4
    15·1 answer
  • Where to locate the nonnegative abscissa, positive ordinate
    13·1 answer
  • 115>5.75x+28.75 what is x
    9·1 answer
  • If a high-speed color printer can print 72 color copies in 4 minutes, what is the unit rate in color copies per minute?
    10·2 answers
  • A quality control engineer at a potato chip company tests the bag filling machine by weighing bags of potato chips. Not every ba
    11·1 answer
  • I’ll give brainliest <br> Completed a full explanation of statistics with explanation and examples ?
    15·1 answer
  • 40 - 2x [(8 x 3 + 6) +<br>12 -2 pls answer correctly​
    14·2 answers
  • (-6-4) divided by (-5)
    12·2 answers
  • A scientist has two solutions, which she has labeled Solution A and Solution B. Each contains salt. She knows that Solution A is
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!