3 years ago

How do you find the area of a rectangle or square??? Do you multiply LxW

Mathematics

1 answer:

Anna007 [38]3 years ago

5 0

Yes. multiply the L (ex 3 ft) and the W (ex. 4 ft) so 3x4 = 12 the area of the square or rectangle is 12 sq ft

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The batteries from a certain manufacturer have a mean lifetime of 850 hours, with a standard deviation of 70 hours, assuming tha

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To answer (a), we will need to find the Z value for 710 hours and 990 hours.

$\begin{gathered} For\text{ 710} \\ Z\text{ = }\frac{x-\mu}{\sigma} \\ \text{ = }\frac{710-850}{70} \\ \text{ = -2} \\ p\text{ =0.0228 } \\ For\text{ 990:} \\ Z\text{ = }\frac{990-850}{70} \\ \text{ =2} \\ p\text{ = 0.9772} \end{gathered}$ $\begin{gathered} To\text{ find P \lparen–2 \le Z \le 2\rparen} \\ =\text{ 0.9772 -0.0228} \\ =\text{ 0.9544} \\ =95.44\% \end{gathered}$

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1 year ago

Help plis and thankyou :)<br><br>

alina1380 [7]

hola cómo estás yo muy bien y tu qué tal

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3 years ago

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