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PilotLPTM [1.2K]
3 years ago
11

Eric drove 248 miles in 4 hours. If he continues to travel at the speed, how far will he go in 7 hours and 30 minutes?

Mathematics
2 answers:
ozzi3 years ago
7 0

Answer:

465 miles

Step-by-step explanation:

Convert the time in hours to time in minutes, which would give us 4 hours to be 240 minutes and 7 hours 30 minutes to be 450 minutes.

Create a proportion.

\frac{248 miles}{240 minutes}  = \frac{x miles}{450 minutes} \\248*450 = 240x\\111600=240 x\\465 = x

qaws [65]3 years ago
6 0
248/4=62
62•7 1/2=465 miles

He will go 465 miles in 7 hours and 30 minutes
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Step-by-step explanation:

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-We calculate the confidence interval using this value at 95% confidence level:

CI=\hat p\pm z \sqrt{\frac{\hat p(1-\hat p)}{n}}\\\\\\=0.65\pm 1.96\times \sqrt{\frac{0.65\times 0.35}{12000}}\\\\\\=0.65\pm 0.0085\\\\\\=[0.6415,0.6585]

So, the 95% confidence interval is (0.6515,0.6585).

Hence, we are 95% confident that the true proportion of TV audience is between 65.15% and 65.85%.

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3 years ago
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