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3 years ago

A snowmobile travels in a straight line.The snow-mobile’s initial velocity is +3.0 m/s.

Mathematics

2 answers:

Ipatiy [6.2K]3 years ago

7 0

A) 7 x 0.5 = 3.5 +3.0 = 6.5 m/s

B) 3/.6 = 5, it will take 5 seconds to stop

Troyanec [42]3 years ago

3 0

$v_{f}=v_{i}+at$
$v_{f}=3.0m/s+(0.50m/s^{2})(7.0s)$
$v_{f}=3+3.5=6.5m/s$

$v_{f}=v_{i}+at$
$t=\frac{v_{f}-v_{i}}{a}$
$t=\frac{0-3}{-0.6}$
$t=5sec$

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3 years ago

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A recent study asked U. S. Adults to name 10 historic events that occurred during their lifetime that have had the greatest impa

Nadusha1986 [10]

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<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

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

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In this problem, the parameters are:

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$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.77 - 2.575\sqrt{\frac{0.77(0.23)}{2000}} = 0.7458$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.77 + 2.575\sqrt{\frac{0.77(0.23)}{2000}} = 0.7942$

The 99% confidence interval for the proportion of all U. S. Adults who would include the 9/11 attacks on their list of 10 historic events is (0.7458, 0.7942). It means that we are 99% sure that the true proportion for all U.S. adults is between these two bounds.

More can be learned about the z-distribution at brainly.com/question/25890103

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2 years ago

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2 years ago

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givi [52]

Hey there!

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Hope this helped you out! :-)

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3 years ago

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