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3 years ago

10

a spinner is divided into 6 equal sections numbered from 1 to 6 if the arrow is spun once what is the probability that it will l

and on a section numbered 4 or 5

1 answer:

ElenaW [278]3 years ago

4 0

Answer:

1/3

Step-by-step explanation:

4 and 5 are two terms

two out of 6 terms is one third

therefore it has a probability of one out of three

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Which expression is a factor of 21x2 + 13x − 20?

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Answer: A............

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3 years ago

If the sum of a number and four is tripled the result is eight less than twice the number

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Answer:

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2 years ago

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2 years ago

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

matrenka [14]

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

Please help! 12 points

Ivahew [28]

Answer:

Step-by-step explanation:

sin2x = 2sinx*cosx

= $2\sqrt{sin^{2}x }$ * cosx

= $2\sqrt{(1-cos^{2}x }$ * cosx

= 2 $\sqrt{1-\frac{3}{5} ^{2} } *\frac{3}{5}$

= $\frac{8}{5} * \frac{3}{5}$

= 24/25

8 0

3 years ago