3 years ago

Explain how you can use reasoning to compare two fractions with the same denominator.

1 answer:

5 0

Since if a denominator and another are the same you have the best opportunity to add subtract or do what you think is best

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Ksju [112]

Answer:C because if you look at 7 the 140 its multiplied by 2 so if you multipy or divide everything by 2 you get C

Step-by-step explanation: It just is G

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3 years ago

If it takes 5 people 5 minutes to make 5 pencils, how long would it take 100 people to make 100 pencils?

Fofino [41]

First let's figure out how many people it takes to make one pencil. One person can make 1 pencil in 1 minute. So, 100 people would take 100 minutes to get 100 pencils.

Or multiply all the 5's by 20 and you'll get 100 minutes.

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3 years ago

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FrozenT [24]

Answer:

The answer is: 10^5=100'000

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2 years ago

Plutonium-240 decays according to the function L where o

PIT_PIT [208]

Answer:

$\boxed{\textbf{1700 yr}}$

Step-by-step explanation:

$-\dfrac{\text{d}L}{\text{d}t} = kL\\\\\dfrac{dL}{L}=-kdt\\\\\ln L = -kt + C\\\text{At t = 0, L = L$_{0}$, so C = $\ln L_{0}$}\\\ln L = -kt + \ln L_{0}\\\ln L_{0} - \ln L = kt\\\\\ln \dfrac{L_{0}}{L} =kt$

Data:

L₀ = 24 g

L = 20 g

k = 0.000 11 yr⁻¹

Calculation:

$\ln \dfrac{24}{20} =0.000 11t\\\\\ln 1.2 = 0.000 11t\\\\0.1823 = 0.000 11t\\\\t = \dfrac{0.1823}{0.000 11} = \textbf{1700 yr}\\\\\text{It will take } \boxed{\textbf{1700 yr}}\text{ for the polonium to decay to 20 g}$

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3 years ago

HELP WITH VOLUME AND SURFACE AREA!!!!!! WILL MARK BRAINLIEST!!!!!

ArbitrLikvidat [17]

Answer:

Volume is 48 yards cubed

surface area is 96 yards squared

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3 years ago