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3 years ago

Which solid figure has 5 faces, 5 vertices, and 8 edges.

1 answer:

7 0

A square<span> pyramid </span><span> has 5 faces, 8 edges, and 5 vertices. Remember: A face is a flat side of a solid. An edge is where 2 faces of a solid meet. A vertex is where 3 or more faces meet.</span>

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Five thousand tickets are sold at $1 each for a charity raffle. Tickets are to be drawn at random and monetary prizes awarded a

Elis [28]

Answer:

The expected value of this raffle if you buy 1 ticket is $0.41.

Step-by-step explanation:

The expected value of the raffle if we buy one ticket is the sum of the prizes multiplied by each of its probabilities.

This can be written as:

$E(X)=\sum p_iX_i$

For example, the first prize is $800 and we have only 1 prize, that divided by the number of tickets gives us a probability of 1/5000.

If we do this with all the prizes, we can calculate the expected value of a ticket.

$E(X)=\sum p_iX_i\\\\\\E(X)=\dfrac{1\cdot800+3\cdot200+5\cdot50+20\cdot20}{5000}\\\\\\E(X)=\dfrac{800+600+250+400}{5000}=\dfrac{2050}{5000}=0.41$

7 0

3 years ago

When you look at a speck of mold how many microbes are you most likely seeing

jek_recluse [69]

100,000,000 microbes in a speck of mold

4 0

3 years ago

If F(x)= x2+2x-3 and g(x)=x2-9 , find (f/g)(4) and(f+g)(4) .(f/g)(4) is , and (f+g)(4) is .

Alexandra [31]

F(x) = x2+2x-3 = 1
g(x) = x2-9 = -7

(f/g)(4) = (1/-7)(4) = (-0.14)(4) = -0.57
(f+g)(4) = (1+(-7))(4) = (-6)(4) = -24

7 0

4 years ago

Two researchers, Jaime and Maria, each construct confidence intervals for the proportion of a population who is left-handed. The

tekilochka [14]

Answer:

Step-by-step explanation:

From data give above we have

Point estimate $= \hat{p} = 0.13$

Jamie interval = (0.097 , 0.163)

Mariya's interval = (0.117,0.173)

Mean value of jamie interval $= \frac{0.097+0.163}{2} = 0.13$

therefore we can say jamie interval is equal to point estimate which is equal to 0.13

Now mean of Mariyah

$\frac{0.117+0.173}{2} = 0.145$

According to the given calculation, Mariyah interval is wrong due to mean value.

5 0

4 years ago

What is three divided by two thirds?

Serhud [2]

Answer:

4 1/2

Step-by-step explanation:

3÷ 2/3

Copy dot flip

3 * 3/2

Multiply the numerators

3*3 =9

The denominator is 2

Numerator over denominator

9/2

Change to a mixed number

9/2 = 4 1/2

6 0

4 years ago