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Ahat [919]
3 years ago
8

A and B are mutually exclusive events. P(A) = 0.60 and P(B) =0.20. What is P(A or B)?

Mathematics
1 answer:
kipiarov [429]3 years ago
5 0

Answer:

As they are mutually exclusive events so

P(A) = 0.60

P(B) = 0.20

p(A or B) = P(A) + P(B)

= 0.60 + 0.20

= 0.80

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3 years ago
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What is the invers function of f(x)=(n+1)^3?
zimovet [89]

Answer:

f^{-1}(x)=\sqrt[3]{x}-1

Step-by-step explanation:

f(x)=(x+1)^3\\\\y=(x+1)^3\\\\x=(y+1)^3\\\\\sqrt[3]{x}=y+1\\\\y=\sqrt[3]{x}-1\\ \\f^{-1}(x)=\sqrt[3]{x}-1

Graphing both inverses, they will be symmetrical about the line y=x.

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3 years ago
A source of laser light sends rays AB and AC toward two opposite walls of a hall. The light rays strike the walls at points B an
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Answer: 70  meters.

Step-by-step explanation:

Observe the figure attached.

The distance between the walls is:

DE=AD+AE

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Both triangles are right triangles. Therefore, you can calculate the distance  between the walls as following:

- Calculate the distance AD:

cos\alpha=\frac{adjacent}{hypotenuse}\\\\cos(60\°)=\frac{AD}{60}\\AD=30m

- Calculate the distance AE:

tan\beta =\frac{opposite}{adjacent}\\\\tan(45\°)=\frac{40}{AE}\\\\AE=\frac{40}{tan(45\°)}\\\\AE=40m

Therefore the distance between the walls is:

DE=30m+40m=70m

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3 years ago
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Find the volume of the following figure. Round to the nearest tenth.
sp2606 [1]

Answer:

A

Step-by-step explanation:

volume of cylinder= πr²h

r= 12cm

h = 19cm

putting the values in the formula

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3 years ago
Louise bought 114 pounds of roast beef at $2.00 per pound and ​ 212 ​pounds of turkey at $1.50 per pound. What was her total cos
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114 * 2 + 212*1.5
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