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3 years ago

Help ASAP pleasee!!!!

Mathematics

1 answer:

Aleks04 [339]3 years ago

7 0

Answer:

243

Step-by-step explanation:

hope this helps!! god bless!! -Natalia

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Your friend sells half her stock of keyrings every hour. She has 24 boxes at the of the sale. How many boxes will she have left

Law Incorporation [45]

At 0 hours: 24 boxes
After 1 hour: 24/2 = 12 boxes
After 2 hours: 12/2 = 6 boxes
After 3 hours: 6/2 = 3 boxes

She will have 3 boxes after 3 hours.

Hope this helps :)

5 0

3 years ago

Can you figure out the answer please

miss Akunina [59]

Answer:

h = — 10.071

Step-by-step explanation:

Look at the picture for my work.

7 0

2 years ago

9. Determine how long it takes for 80% of the material to decay.

Vilka [71]

Using an exponential function, it is found that it takes 18.6 days for 80% of the material to decay.

The amount of a substance after t days is modeled by:

$A(t) = A(0)e^{-kt}$

In which:

k is the decay rate, as a decimal.

A(0) is the initial amount.

The half-life is of 8 days, hence $A(8) = 0.5A(0)$ , and this is used to find k.

$A(t) = A(0)e^{-kt}$

$0.5A(0) = A(0)e^{-8k}$

$e^{-8k} = 0.5$

$\ln{e^{-8k}} = \ln{0.5}$

$-8k = \ln{0.5}$

$k = -\frac{\ln{0.5}}{8}$

$k = 0.08664339757$

Hence:

$A(t) = A(0)e^{-0.08664339757t}$

The time it takes for 80% of the material to decay it t for which $A(t) = 0.2A(0)$ , hence:

$0.2A(0) = A(0)e^{-0.08664339757t}$

$e^{-0.08664339757t} = 0.2$

$\ln{e^{-0.08664339757t}} = \ln{0.2}$

$-0.08664339757t = \ln{0.2}$

$t = -\frac{\ln{0.2}}{0.08664339757}$

$t = 18.6$

It takes 18.6 days for 80% of the material to decay.

To learn more about exponential functions, you can take a look at brainly.com/question/24906920

5 0

3 years ago

Cory earns d dollars for every hour he works after school. the weekends, his hourly wage is three times the sum of his after sch

blondinia [14]

Answer:

3d+2

Step-by-step explanation:

Because he is getting 3x the amount of his wages it would be 3xd, simplified to 3d. Then add 2.

3 0

2 years ago

Teams with varying numbers of players are playing a group card game. The time taken by each team to complete one game is given i

12345 [234]

Answer:

C. negative linear association

Step-by-step explanation:

<u>We have ordered pairs:</u>

(1, 32), (2, 26), (3, 20), (4, 14), (5, 8)

<u>Looking at the sequence of y-values:</u>

32, 26, 20, 14, 8

We see it is the arithmetic progression with common difference of -6.

It means the function representing this relationship is linear.

Correct option is C.

5 0

2 years ago