muaazaraiz12

Our department seminar room is lit by 7 light bulbs, controlled by a single switch. A minimum of 3 lights are needed for the room to be usable. Suppose the lifetime of the brand of light bulbs fitted is exponentially distributed with a mean of 400 hours. Assume a seminar lasts exactly 1 hour, and that the lights are switched on only during the seminar. What is the probability that after 500 seminars, exactly 3 bulbs do not need to be replaced? You may need to use a calculator. 

Give your answer rounded to 4 decimal places.

Assume that 15% of the people in your expedition trip
own a mobile phone, and you are randomly assigned to
two partners in your group. Find the probability that:
a) The first partner will have a mobile phone.
b) The first partner will not have a mobile phone.
c) That both partners will have mobile phones.
d) That at most one will have a mobile phone.

At the local petting zoo, 65% of the goats are female.  A researcher selects a sample of five of the goats and notes that three are female.  What are p and p^ (p-hat) for female goats?

A shopkeeper has a vessel which is full of vinegar. (1/4) of the vinegar is taken out and the vessel is filled with water. If the process is repeated 4 times and 10 liters of vinegar is now left in the vessel, so what is the capacity of the vessel?

Options:

2760/81 liters

2560/81 liters

33 liters

32 liters

Discuss the difference between categorical frequency distribution and grouped frequency distribution using examples.

7 students randomly select one topic among A, B and C topics for a homework. What is the probabilitythat topic A is selected by exactly 2 students?

I need to factor it completely. I do not know how to approachthis kind of a problem, so of you can, please describe how youwould solve it from the beginning. Thanks!
D(1 + m)² + D(1 + m)² m

2. We toss a fair six-sided die twice, and record the number that is showing on each toss.
(a) How many outcomes are there in the sample space?

(b) What is the probability that the die shows 5 at least once?

(c) What is the probability that the die does not show 5?

What are the possible remainders when a square number is divided by 3?

Brenda's school is selling tickets to a spring musical. On the first day of ticket sales the school sold 6 senior citizen tickets and 4 child tickets for a total of $68. The school took in $59 on the second day by selling 3 senior citizen tickets and 7 child tickets.

Define variables and write a system of equations that model the situation.

What is the price each of one senior citizen ticket and one child ticket?

 On the third day of ticket sales, no senior citizens purchased tickets. Make a table to determine how many tickets would need to be sold in order to make at least $35?

Consider the line which passes through the point P(4, -3, 2), andwhich is parallel to the line x=1+4t,y=2+4t,z=3+7t
Find the point of intersection of this new line with each ofthe coordinate planes:

XY plane:

XZ plane:

YZ plane:

Consider the line which passes through the point P(-5, -5, 2), and which is parallel to the line x=1+5t,y=2+2t,z=3+6tx=1+5t,y=2+2t,z=3+6t
Find the point of intersection of this new line with each of the coordinate planes:

xy-plane: ( , , )

xz-plane: ( , , )

yz-plane: ( , , )

Consider the line which passes through the point P(2,1,−5), andwhich is parallel to the line x=1+5t,y=2+2t,z=3+3t Find the pointof intersection of this new line with each of the coordinateplanes:

The population P (in thousands) of Charlotte, North Carolina from 1980 through 2013 can be modeled by P = 321e0.0275t where t = 0 corresponds to 1980.† (Round your answers to the nearest whole number.) (a) What was the population of Charlotte in 2013?

16. Consider the line 3x - 4y = 6 in the standard (x,y)

coordinate plane. For the point on this line with

x-coordinate equal to 3, what is the y-coordinate?

When a polynomial f(x) is divided by x - 2 and x + 1, the remainders are 3 and -3 respectively.
Find he remainder when f(x) is divided by ( x² - x - 2 )

If x and y is divided by 7, remainders are 3 and 5, respectively. What is the remainder, if the (1) sum of x and y is divided by 7; (2) the product of x and y is divided by 7?

If p > 5 is prime, and p is divided by 10 (that is, p = 10q + r, with 0 ≤ r < 10), show that the only possible remainders are r = 1,3,7,9.

1. Is the function f : R ? R with f(x) =x^3 + 9 one-to-one? If so, prove it. If not, provide acounterexample.

Solve the IVP: (x+1)(y^1/2) dy/dx +(2y^3/2) =1, y(0)=1

and determine the maximal solution
interval.

If the Fermi energy of a silicon sample is uniformly 0.2 eV below the conduction band,
calculate:
a. Electron and hole densities
b. Doping concentration
Assume the bandgap is 1.12 eV, at room temperature and the effective density of states, Nc, is
2.86 x 1019 cm-3 and intrinsic carrier concentration is 9.65 x 109 cm-3.

The equations for free fall near the surfaces of Man and Jupiter Cs in meters, tin seconds) are: Mars, s = 1.86t/2; Jupiter, s = 11.44t/2• How long would it take a rock falling from rest to reach a velocity of 16.6 m/sec (about 60 km/h) on each planet?

Michael is a teacher one of his goals is to go back at shool to earn his masters degree in education.his monthly net income is $2500 so he know that he need to put himselfe on a budget for a period of time in order to save money to go back to school

making a plan\\

.step 1 \\ research shows that consumer credit counseling services recommend allocating the following percentages for each category of the monthly budget:

housing %25 transporation %10 saving %5 utilities %5 debt payments %20 food %15 misc. %20

task 1: if michael folow this plan how much will he put away in sayvings at the end of one year?

task 2: if michael folow this plan how much will he ​spend on food by the end of one year?

step 2\\ after investigating several schools in this area, michael chooses to attend a state collge that offers a one year program for the degree he wishes to pursue . michael will need $3000 for tuition and fees the first semester and $450 for textbooks.

task 3: what is the total cost for books and fees, and textbooks for one semester?

finding a solution\\

step 3\\ by controlling his spending michael is able to save for his masters degree.

task 4: how many months will michael have to save to pay for one semester at this college?

task 5: if michael can increase his savings to %10 of his monthly budget by making cuts in other areas, how long would he have to save to pay for one semester?

step 4 \\ once miichael earn his advanced degree his salary will increase on the following schedule:

- year 1 an aditional $4200

- year 2 an additional $4800

- year 3 an additional $5200

- year 4 an additional $5500

- year 5 an additional $5800

task 6: if mishael goes bach to his orginal budget how much will he be saving with his new income after five years?

task 7: how much will he have available for misc spending?

Applying the situation to your life:

task 8: do you have a budget ?

task 9: how would you adjust mishael budget to fit your needs ?

task 10: you may not be planing to get a master degree but probably you thinking of saving up for some important purchase , are you thinking of buying a new car that is more fuel efficient ? are you planing a spicial trip? how could you adjust michael budget to help you with your goal?

In the newly developing country of Zamwana, teaching reading is a focal point of the government program. The plan is for each individual who can read to spend one year teaching two others to read. That individual is done, but the two new readers must spend one year, each teaching two others to read. if 1,000 people can read in Zamwana now, how many peopie will be able to read in ten years?

Give two instances of how to modify a Microsoft Access record.

Help Please

I already did A, just need B C and D

Cooperative sector industries are typically owned and operated by:
1
a. The government
b. Private individuals
c. Producers or suppliers of raw materials
d. Joint ownership with the state

McQueen called 9 repair shops for quotes for auto repairs.  The prices are $90, $50, $45, $5, $167, $155, $40, $55, and $53.  

Use the outlier test to determine if there are any outliers in the data.

Sally is driving in Radiator Springs and makes a sudden stop.  The drag factor of the road is 0.6 and the brakes are operating at 99% efficiency. 

If she leaves tire marks that are 40 and 46 feet long, how fast was she going?

Fred has saved $250,000 for his retirement and plans to makeequal monthly withdrawals from the account for the next 20 years.If the account earns 5.7% interest compounded monthly, how much canFred withdraw each month?

 To calculate surface area, use the equation: (PS)/2 + 1/2bh (if it’s a triangle) or (PS)/2 + b^2 (if it’s a square)

Calculate the surface area of each pyramid with the following values. (P = perimeter, b = one side of the base, s=side, h=height). Number of sides is given in each problem. The first two have hints to let you know what the shape of the base is…..

1. P = 12 ft, s = 4 ft, b = 4 ft, h=2 ft, 3 sides (base is a triangle)
2. b = 4 in, P = 16 in, s = 12, 4 sides (base is a square)
3. P = 48 m, b = 12 m, s=12, 4 sides
4. P = 45 yds, b = 15 yds, s=15, h=12, 3 sides
5. b = 6 ft, P = 24 ft, s=6, 4 sides
6. P = 15 ft, b = 5 ft, s=5 ft, h= 4, 3 sides
7. b = 4 in, P = 16 in, s=11, 4 sides
8. P = 40 m, b = 10 m, s=10, 4 sides
9. P = 45 yds, b = 15 yds, s=10, h=8, 3 sides
10. b = 16 ft, P = 64 ft, s=8, 4 sides
11. b = 5 ft, P = 20 ft, s=7, 4 sides
12. P = 45 ft, b = 15 ft, s=10, h=8, 3 sides
13. b = 13 in, P = 52 in, s=11, 4 sides
14. P = 28 m, b = 7 m, s=8, 4 sides
15. P = 27 yds, b = 9 yds, s=30, h=25, 3 sides

Can you help with first order linear differential equations?

problem 3 www 1245 ir spectrum 2984 1741 1200 800 0.0 4000 3000 2000 1600 v (cm) mass spectrum 100 0.5 43 1 uv spectrum 60 40 1.0 % of base peak 29 m88 solvent: ethanol 15.4 mg/10 mis path length: 1.00 cm 20 c_{4}*h_{8}*o_{2} 1.5 350 80 240 200 280 200 40 120 160 m/e 250 300 λ (nm) 13c nmr spectrum 150.0 mhz, cdc, solution) dept c*h_{2} + ch, ch solvent proton decoupled 200 160 120 80 40 0 8 (ppm) th nmr spectrum (200 mhz, cdc*l_{2} solution) tms t 10 9 8 7 6 5 4 3 2 1 0 8 (ppm)

After reading “Isn’t Everyone a Little Weird?” and completing the poll, answer the following questions:

• Do you think being weird is a good thing?
• Do you think  “weirdness” brings people together or divides them?
• Can you think of any other famous people that are considered “weird”?
• Use examples or textual evidence to support your responses.

How to learn python in 1 hour? It’s possible?                

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An oil-drilling company knows that it costs $25,000 to sink a test well. If oil is hit, the income for the drilling company will be $325,000. If only natural gas is hit, the income will be $150,000. If nothing is hit, there will be no income. If the probability of hitting oil is 1/40 and if the probability of hitting gas is 1/20, what is the expectation for the drilling company?

We know that in a game of U.S. roulette, the probability that the ball drops into any one slot is 1 out of 38. Suppose that there are two balls spinning at once, and that it is physically possible for two balls to fit into the same slot. What is the probability that both balls would drop into the same slot? (Enter the probability as a fraction.)