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3 years ago

A compact disc is designed to last an average of 4 years with a standard deviation of 0.8 years.

Mathematics

1 answer:

Mashutka [201]3 years ago

7 0

3-4/.8=1.25
then use the probability z chart,

10.56%

!!!

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Find the correct answer and solve? |y-9|=6

balandron [24]

|y-9|=6

y-9=6
y-9=-6

y=15
y=3

So, y=15,3

5 0

3 years ago

y is inversely proptional to x when y = 7, x = 9 a) work out an equation connecting y and x b) work out the value of y when x =

OLga [1]

Answer:

a) yx=63

b) y=3

Step-by-step explanation:

yx=k (inverse formula)

7(9)=k

63=k

y(21)=63

y=63/21

y=3

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3 years ago

Classify the four angles of the quadrilateral.

makkiz [27]

Answer:

<A= right

<B= acute

<C= obtuse

<D= acute

Step-by-step explanation:

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3 years ago

Over a two hour time period a snail moved 46 inches. How far is this in yards?

Anton [14]

It would be exactly 1.2778 yards.

7 0

3 years ago

HELP PLEASE WILL MARK BRAINLIEST!!

Arte-miy333 [17]

Answer:

Answer is option d)346.4 ft

Step-by-step explanation:

$from \: the \: figure \\ AB = 300 \: ft \: \: \: angle \: C = 60 \:( theta)\: degress \\ in \: triangle \: ABC \: using \: tan \: theta\\ \tan(60) = \frac{opposite \: side}{adjacent \: side} \\ \tan(60) = \frac{300}{BC} \\ \sqrt{3} = \frac{300}{BC} \\ BC = \frac{300}{ \sqrt{3} } \\ BC = 100 \sqrt{3} ft \\ then \: in \: triangle \: ABD \: using \: tan \: theta \\ angle \: D = 30 \: degrees \: (theta) \\ \tan(30 ) =\frac{opposite \: side}{adjacent \: side} \\ \tan(30) = \frac{300}{BD} \\ \frac{1}{ \sqrt{ 3} } = \frac{300}{BD} \\ BD = 300 \sqrt{3} \\ CD = BD - BC \\ = 300 \sqrt{3 } - 100 \sqrt{3} \\ = (300 - 100) \sqrt{3} \\ = 200 \sqrt{3 } \\ = 200 \times 1.732 \\ = 346.4 \: ft$

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THANKS FOR GIVING ME THE OPPORTUNITY TO ANSWER YOUR QUESTION. 

7 0

3 years ago