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atroni [7]
2 years ago
11

1. How long does it take running at a rate of 12m/s over a distance of 360m?

Mathematics
1 answer:
dedylja [7]2 years ago
8 0

Step-by-step explanation:

T=D/S

D=360m

S=12m/s

360m÷12m/s

Time=30s

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Answer:

147+25=172

Step-by-step explanation:

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nignag [31]

You just need to plug the values: you have to multiply x and y^2, and then divide the result by -3.

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Which means that xy^2 = 5\cdot 4 = 20

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Medical scientists study the effect of acute infection on tissue-specific immunity. In a collection of experiments under the sam
Serjik [45]

Answer:

The 95% confidence interval  for the true proportion of mice that will test positive under similar conditions is (0.5291, 0.6429).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence interval 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

Z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

In a collection of experiments under the same conditions, 44 of 75 mice test positive for lymphadenopathy. This means that n = 75 and \pi = \frac{44}{75} = 0.586.

Compute a 95% confidence interval for the true proportion of mice that will test positive under similar conditions.

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

The lower limit of this interval is:

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The upper limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.586 + 1.96\sqrt{\frac{0.586*0.414}{75}} = 0.6429

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7 0
2 years ago
A hot air balloon is cruising at an altitude of 120 meters above the ground when it begins its descent. The balloon descends at
Gekata [30.6K]

Answer:

120 - 4.5t= 75

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Step-by-step explanation:

the equation :

120 - 4.5t= 75

the solution:

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-4.5t = -45

t = -45/(-4.5) = 10 minutes

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2 years ago
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