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IgorLugansk [536]
3 years ago
10

Please help ASAP I need work and answers

Mathematics
1 answer:
Nesterboy [21]3 years ago
8 0

Answer:

14.1.5 hours

15. 7 hours

Step-by-step explanation:

14.

225÷(70+80)=225÷150=1.5 Hours

15.

time taken=56÷(3+5)=7 Hours

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xP(x)00.2510.0520.1530.55Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal pl
Nookie1986 [14]

The Solution:

Given:

Required:

Find the standard deviation of the probability distribution.

Step 1:

Find the expected value of the probability distribution.

E(x)=\mu=\sum_{i\mathop{=}0}^3x_iP_(x_i)\begin{gathered} \mu=(0\times0.25)+(1\times0.05)+(2\times0.15)+(3\times0.55) \\  \\ \mu=0+0.05+0.30+1.65=2.0 \end{gathered}

Step 2:

Find the standard deviation.

Standard\text{ Deviation}=\sqrt{\sum_{i\mathop{=}0}^3(x_i-\mu)^2P_(x_i)}=(0-2)^2(0.25)+(1-2)^2(0.05)+(2-2)^2(0.15)+(3-2)^2(0.55)=4(0.25)+1(0.05)+0(0.15)+1(0.55)=1+0.05+0+0.55=1.60

Thus, the standard deviation is 1.60

Answer:

1.60

8 0
1 year ago
2) Lucy spent $15, 500 to purchase a new car this year. Lucy can expect her car to depreciate at a rate of 7% per year.
Lelechka [254]

Answer:

<u>Equation: V = C * (1 - r)^t</u>

<u>Answer: $ 8,066.37</u>

Step-by-step explanation:

Let's recall that depreciation on a car can be determined by the formula:

V = C * (1 - r)^t , where:

V is the value of the car after t years,

C is the original cost

r is the rate of depreciation

t is the number of years of utilization of the car

Therefore, we have:

V = C * (1-r)^t

V = 15,500 * (1 - 0.07)⁹

V = 8,066.37 (rounding to the next cent)

5 0
3 years ago
What equation is equivalent to y+2 = -2(x-3) in slope intercept form
Temka [501]

Answer:

-x+y+5

Step-by-step explanation:

7 0
4 years ago
What is the percentage of 12/10
Sav [38]
120% that would be the percentage of 12/10. 

12 divided by 10 = 1.2

1.2 times 100 = 120

That is equal to 120%
8 0
3 years ago
Read 2 more answers
6. How many 4 digit odd numbers can be formed if no digit can be repeated?
ale4655 [162]
1, 3, 5, 7, 9 are the possible digits

meaning you have 5! possible combinations or 120 combinations
6 0
3 years ago
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