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3 years ago

12

(c) Write down the reciprocal of 20

1 answer:

Assoli18 [71]3 years ago

5 0

Answer:

1/20

Step-by-step explanation:

The reciprocal just means that you flip the numerator & denominator. Any whole number always has a denominator of 1, so you just flip it to 1/20. Hope this helps!

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Kitty [74]

The mean of this discrete random variable is 7.96

<em><u>Solution:</u></em>

Given that,

x 4 6 9 11 15

P(x) 0.20 0.34 0.15 0.22 0.09

<u><em>Mean is given as:</em></u>

$\mu_{x}=\sum[x \times P(x)]$

Therefore,

$\mu_{x} = (4 \times 0.20) + (6 \times 0.34 ) + (9 \times 0.15 ) + (11 \times 0.22 ) + (15 \times 0.09)\\\\Simplify\\\\\mu_{x} = 0.8 + 2.04 + 1.35 + 2.42 + 1.35\\\\\mu_{x} = 7.96$

Thus, mean of this discrete random variable is 7.96

7 0

3 years ago

How to find these answers?

PtichkaEL [24]

Answer:

21.) 50°

22.) 135°

23.) 37°

24.) 100°

25.) 105°

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Step-by-step explanation:

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3 years ago

A town has a population of 2000 and grows at 2% every year. To the nearest year, how long will it be until the population will r

MissTica

Answer:

21 years

Step-by-step explanation:

Use the equation $2000(1.02)^{x}$ $= 3000$ where x is the number of years passed.

Once you've solved for it, x=20.475319. Although it's closer to 20 years to the nearest year, it's 21 years since you'll wont reach 3000 in year 20.

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3 years ago

Read 2 more answers

What transformation of the parent function f(x) is made to get -2f(x)?

horrorfan [7]

Answer:

A.

Step-by-step explanation:

The negative gives a reflection in the x-axis.

The 2 is a vertical stretch factor 2.

8 0

3 years ago

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. Based on the money earned at e

AVprozaik [17]

Answer:

B

Step-by-step explanation:

Because, according to the graph, they are making the most sells.

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4 years ago