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2 years ago

V = u + at u = 2 and a= -5 and t= 1/2 work out the value of v

Mathematics

2 answers:

Darina [25.2K]2 years ago

8 0

Step-by-step explanation:

v=u+at

v=2+(-5)1

2

v=2-2.5

v=-0.5m/s²

hope it helps.

frosja888 [35]2 years ago

8 0

Answer:

$v = u + at \\ v = 2 + ( - 5)( \frac{1}{2} ) \\ v = 2 + \frac{( - 5)}{2} \\ v = \frac{4 + ( - 5)}{2} \\ v = \frac{ (- 1)}{2} \\ v = - 0.5 \: m {s}^{ - 1}$

<h3>-0.5 m/s is the right answer.</h3>

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Step-by-step explanation:

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Where $\mu=106$ and $\sigma=0.3$

Part a

We are interested on this probability

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And we can use the z score formula given by:

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And using this formula we got:

$P(X>106.11)=P(\frac{X-\mu}{\sigma}\frac{106.11-106}{0.3})=P(z>0.37)$

And we can find this probability with the complement rule:

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For this case we select a sample of n =44 and the new z score formula is given by:

$z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we find the z score we got:

$z =\frac{106.11- 106}{\frac{0.3}{\sqrt{44}}}= 2.431$

And if we use the z score we got:

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