Please help! I need this correct,
2 answers:
Answer:
A. 56
Step-by-step explanation:
If you look at the image, I cut the shape in half.
So the shape on the bottom not can be multiplied as such: 8x2x2
8x2=16 then 16x2=32.
Since the shape cut in half, the sides are now 2 instead of 4.
Now you can multiply the top shape by: 2x6x2
2x6=12 then 12x2=24.
After you have the volume of both shapes, you add the volumes together.
32+24=56 Then your answer should be A. (Hope this helps!)
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Above have some steps,hope it can help
Answer:
The expected value of the profit is $-1
Step-by-step explanation:
The expected value of any discrete variable X is calculate as:
E(X)=X1*P(X1)+X2*P(X3)+...+X3*P(X3)
Where X1, X2, ..., X3 are the values that the variable can take and P(X1), P(X2), ..., P(X3) are their probabilities.
In this case the variable X is the dollars that can win, so:
X1=$2,000
X2=$300
x3=$20
X4=$0
Then the probabilities can be calculate as:
Replacing the variables and probabilities on the equation of expected value we get:
E(X)=$4
Additionally, the student bought a ticket by $5, so the expected profit can be calculate as:
Expected Profit = Expected Earnings - Cost = $4 - $5 = $-1
Finally, the expected value of the profit is $-1