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Deffense [45]
3 years ago
14

A construction company is planning to bid on a building contract. The bid costs the company ​$1400. The probability that the bid

is accepted is 1/4. If the bid is​ accepted, the company will make ​$17,600 minus the cost of the bid.
What is the expected value in this​ situation?
Mathematics
1 answer:
liubo4ka [24]3 years ago
7 0

Answer:

$3,000

Step-by-step explanation:

There two possible outcomes:

There is a 3/4 chance that the bid is rejected for a value of -$1,400

There is a 1/4 chance that the bid is accepted for a value of $17,600 - $1,400.

The expected value of the situation is:

E = \frac{3}{4}*(-1,400)+\frac{1}{4}*(17,600-1,400)\\E=\$3,000

The expected value is $3,000.

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An element with mass 800 grams decays by 8.2% per day. How much of the element is remaining after 15 days,
Serjik [45]

Given:

The initial mass of an element is 800 grams.

Decay rate = 8.2% per day

Number of days = 15

To find:

The remaining element after 15 days.

Solution:

The exponential decay model is

y=a(1-r)^t

Where, a is the initial value r is the rate of interest and t is time period.

Putting a=800,r=0.082,t=15 in the above formula, we get

y=800(1-0.082)^{15}

y=800(0.918)^{15}

y=221.68188

y\approx 221.7

Therefore, the mass of the remaining element is 221.7 grams.

7 0
3 years ago
Please help 100 points.​
IceJOKER [234]

Answer:

76 square feet

Step-by-step explanation:

surface area = 2(wl + hl + hw)      w=width     h=height       l=length

surface area = 2(5*4 + 2*4 + 2*5)

surface area = 2(20 + 8 + 10)

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surface area = 76 square feet

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4 years ago
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mrs_skeptik [129]
The answer is (4, 3). Hope this helps!
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How do i check 1/3v=-5 ?
BigorU [14]

If you mean that you want to solve the equation for v, then all you need to do is to multiply both sides by 3:

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