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3 years ago

6

Laura goes to a Mexican restaurant for lunch she's planning to order either a chicken or beef dish if there are a choices for ch

icken and 12 choice es for beef how many options does Laura have to choose from
A. 4
B. 8
C. 12
D. 20

1 answer:

Yuliya22 [10]3 years ago

8 0

C hope that helps have a good one

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Calcule el precio de un rollo de alambre si se

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A. Encuentre el

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Step-by-step explanation:

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3 years ago

the poster you are giving your friend is in a cardboard tube with a 2 in diameter and 26 in length. will a rectangular piece of

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3 years ago

Simplify the expression 4.5(− 6) + 19.

Mrrafil [7]

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4 years ago

Read 2 more answers

The number of bacteria in a certain population increases according to a continuous exponential growth model, with a growth rate

Veronika [31]

It takes 8.35 hours for the size of the sample to double

Step-by-step explanation:

The form of the continuous exponential growth model is

$A=Pe^{rt}$ , where

A is the new value
P is the initial value
r is the rate of growth or decay in decimal
t is the time

∵ The growth rate is 8.3%

∴ r = 8.3 ÷ 100 = 0.083

∵ The size of the sample will doubled in t hours

∴ A = 2 P

Use the formula of the contentious exponential growth above

∵ $2P=Pe^{0.083t}$

- Divide both sides by P

∴ $2=e^{0.083t}$

- Insert ㏑ in both sides

∴ $ln(2)=ln(e^{0.083t})$

- Remember $ln(e^{n})=n$ because ㏑(e) = 1

∴ $ln(2)=0.083t$

- Divide both sides by 0.083

∴ $\frac{ln(2)}{0.083}=t$

∴ t = 8.35 hours to the nearest hundredth

It takes 8.35 hours for the size of the sample to double

Learn more:

You can learn more about the logarithmic function in brainly.com/question/1447265

#LearnwithBrainly

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4 years ago

A friend has a 83% average before the final exam for a course. That score includes everything but the final, which counts for 25

Klio2033 [76]

Answer:

$\mathrm{Best\:course\:grade\:possible:\:}87.25\%,\\\mathrm{Minimum\:score\:on\:final\:to\:earn\:at\:least\:a\:75\%\:for\:the\:course:\:}51\%$

Step-by-step explanation:

Assuming the maximum score for the final is $100\%$ , we can multiply each score by its respective course weight and add them together to give a final score. If your friend did receive this maximum score of $100\%$ , their overall grade for the course would be:

$83(1-0.25)+100(0.25)=\fbox{$87.25\%$}$ .

To find the minimum score they need to earn a 75% for the course, we set up the following equation:

$83(1-0.25)+x(0.25)=75$ , where $x$ is the minimum score she needs.

Solving, we get:

$62.25+x(0.25)=75,\\x(0.25)=12.75,\\x=\fbox{$51\%$}$ .

8 0

3 years ago