3 years ago

Oscar needs to purchase soft drinks for a staff party. He is

Mathematics

1 answer:

PilotLPTM [1.2K]3 years ago

4 0

Answer:

sorry getting points

Step-by-step explanation:

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Kendra has been monitoring her mileage. According to last week's driving log, she drove 7/12 of a mile in her car and 9 1/4 mile

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9 5/6

Step-by-step explanation:

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3 years ago

Question 1 ( point) A 64g sample of Germanium-66 is left undisturbed for 12.5 hours. At the end of that period, only 2.0g remain

iVinArrow [24]

Answer:

2.5 half-lives

Step-by-step explanation:

Find $t_{h}$ in $N(t)=N_{0}e^{-kt}$ given $N(t) = 2, N_{0} =64,t=\frac{25}{2}$

$N(t)$ is the amount after the time $t$ , $N_0$ `is the initial amount, $t_{h}$ is the half-life

We know that after half-life there will be twice less the initial quantity:

$N(t_{h})=\frac{N_{0} }{2}=N_{0}e^{kt_{h} }$ .

Simplifying gives $\frac{1}{2} =e^{-kt_h} or k = -\frac{In(\frac{1}{2}) }{t_{h} } .$

Plugging this into the initial equation, we obtain that $N(t)=N_{0}e^\frac{In(\frac{1}{2}) }{t_{h} }$ or $N(t)= N_{0} (\frac{1}{2})^\frac{t}{t_h}.$

Finally, just plug in the given values and find the unknown one.

From $2=64(\frac{1}{2})^\frac{\frac{25}{2} }{t_h}$ , we have that $t_h$ = $\frac{25 In (2)}{2 In (32)\\}$

So you should get: $t_{h} =\frac{25 In (2)}{2 In (32)\\}=2.5.$

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Step-by-step explanation:

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What is the percent of change from 5 cups to 8 cups

Maksim231197 [3]

<em>8cups- 5cups= 3cups - change</em>

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3 years ago

A Ferris wheel can accommodate 45 people in 25 minutes. How many people could ride the Ferris wheel in 2 hours? What was that ra

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Answer:

5400

Step-by-step explanation:

60 min=1 hour

120 min=2 hr

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