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Tutors Answer Your Questions about Evaluation Word Problems (FREE)
Question 461048: I answered this question and need to know if my answer is correct
The number of N of aluminum cans can be used each year varies directly as the numbr of people P using the cans. If 53 people use 11,342 cans in one year, how many cans are used in a city which has a population of 1,518,000?. The answer I have is: 324,852,000 is that correct? Thanks
Click here to see answer by ankor@dixie-net.com(15652)   |
Question 461623: hi am stuck on a question on theory of numbers
If x+2y+3z = 1, where x, y, z are positive numbers. find the maximum value of xyz.
If u+v=1, where u, v are positive numbers,find the maximum value of u²v.
Click here to see answer by robertb(4012)  |
Question 461622: hi am stuck on a question on theory of numbers
show that, if p/q is a good approximation of √2 then (p²+2q²)/(2pq) is a better one. starting with p=q=1, show that √2 ~ 577/408 and estimate the accuracy of the approximation.
Click here to see answer by robertb(4012) |
Question 461905: Joyce Jackson purchases works of art for an art gallery .Two years ago she bought a painting for $20.000,and last year she bought one for $35,000 . If painting appreciate 14% per year, how much are two paintings worth now?
Click here to see answer by stanbon(57348) |
Question 461960: Astronomers can use the brihtness of two light sources,such as stars, to compare the distances from the light sources.The intensity , or brightness, of light I is inversely proportionnal to the square of the distance from the light source d.
a) rite an qution that represents this sititution.
b) if d is the independent variable and I is the dependent variable,graph the rqution from exercise a when k=16
c) if two people are viewing the same light source,and one person is three time the distance from the light source as the other person,compare the light intensities t
page 470#42
Click here to see answer by stanbon(57348) |
Question 461625: hi am stuck on a question on theory of numbers
a, b, c, c, are four unequal positive numbers. by using the theorem (if a=b, then a+c=b+c and ac=bc) and considering the first pair of numbers 1/2(a+b) and 1/2(c+d) and then separately, the pairs a,b and c,d prove that
1/4(a+b+c+d)>(abcd)^1/4
Deduce by considering the four unequal numbers a,b,c and 1/3(a+b+c)that
1/3(a+b+c)>(abc)^1/3
what happens to the last inequality (i) if a=b=c
(ii)if a=b≠c?
suggest a generalization of the results proved above?
Phew this is one of the toughest questions i have ever come across?
Click here to see answer by Edwin McCravy(8909)  |
Question 462347: Upon examining the contents of 38 backpacks, it was found that 23 contained a black pen, 27 contained a blue pen, and 21 contained a pencil, 15 contained both a black pen and a blue pen, 12 contained both a black pen and a pencil, 18 contained both a blue pen and a pencil, and 10 contained all three items. How many backpacks contained exactly two of the three writing instruments?
Click here to see answer by edjones(7569)  |
Question 462701: You are taking a computer course in which there will be four tests, each worth 100 points. you have a score of 93, 91,and 93 on the first three tests. You must make a total of 360 in order to get an A. What scores on the last test will give you an A?
Click here to see answer by rwm(914) |
Question 462929: A store mixes Brazilian coffee worth $10 per kilogram and Turkish coffee worth $14 per kilogram. The mixture is to sell for $13 per kilogram. Find how much of each should be used to make a 528-kilogram mixture.
How many kilograms of the Brazilian coffee should be in the mixture?
How many kilograms of the Turkish coffee should be in the mixture?
Click here to see answer by stanbon(57348) |
Question 463077: pls help... answer ASAP :
a three digit code is made up of three diff. digts from the set (2,4,6,8,) . how many three digit codes can be formed if no digit can be repeated?... pls explain and show the solution......
Click here to see answer by Theo(3464)  |
Question 463968: Please I need help....
if 2y+3=5-4y,evaluate 6y-7
at 10am a plane leaves Boston,Massachusetts, for Seatle,Washington, a distance of 3000mi.One hour later a plane leaves Seatle for Boston. Both planes are traveling at a speed of 5000mph.How many hours after the plane leaves Seatle with the planes pass each other?
64a^2-16a+1
Thank you...
Click here to see answer by Alan3354(30993)  |
Question 464162: I'm totally lost and frustrated with these questions. Please help!
A plasma TV company determines that its total profit on the production and sale of x TVs is given by:P(x)= -x^2 + 812x - 9600
As the number of TV’s produced increases, what happens with the profit?
How do you know how many solutions there are to the function? Show how you determined the nature of the solutions using the Discriminant.
Find the solutions and explain what these solutions represent. Use the Quadratic Formula.
How many TV’s must be produced to reach a minimum or maximum profit? Show your work in detail.
What is this minimum or maximum profit? Show your work in detail.
What is the vertex of this graph? Describe what this point represents for this function.
Provide a graph of this function. Include solutions (roots), vertex, axis of symmetry, and labels for each.
Click here to see answer by ewatrrr(10682)  |
Question 464577: The greater of two numbers is 3 more than the smaller. If twice the smaller is added to the greater, the result is 30. Find the numbers. I got this far:
x = number
Lg.# = (x+3)+2x
Sm.# = x
Result = 30
My setup is wrong I know because I can't get the two numbers that add to 30.
Click here to see answer by sudhanshu_kmr(1152)  |
Question 464629: Please hepl me solve this: Suppose that AD,BC,AC and BD are line segments with line AD parallel to line BC. If AD=3, BC=1, and the distance from AD to BC is 5, then what is the sum of the areas of the two triangles formed?
thank you very much....
Click here to see answer by robertb(4012) |
Question 464993: In an article about the cost of health care, Money magazine reported that a visit to a hospital emergency room for something as simple as a sore throat has a mean cost of $328 (Money, January 2009). Assume that the cost for this type of hospital emergency room visit is normally distributed with a standard deviation of $92. Answer the following questions about the cost of a hospital emergency room visit for this medical service.
What is the probability that the cost will be more than $500? (to 4 decimals)
What is the probability that the cost will be less than $250? (to 4 decimals)
What is the probability that the cost will be between $300 and $400? (in inches, to 4 decimals)
If the cost to a patient is in the lower 8% of charges for this medical service, what was the cost of this patient’s emergency room visit? (to 2 decimals)
$
Click here to see answer by stanbon(57348) |
Question 464991: The time between arrivals of vehicles at a particular intersection follows an exponential probability distribution with a mean of 10 seconds.
What is the probability that the arrival time between vehicles is 12 seconds or less (to 4 decimals)?
What is the probability that the arrival time between vehicles is 6 seconds or less (to 4 decimals)?
What is the probability of 30 or more seconds between vehicle arrivals (to 4 decimals)?
Click here to see answer by robertb(4012) |
Question 464588: Your teacher gives you two polynomials. When the first polynomial is subtracted from the second polynomial. The difference is 2n to the second power + n - 4. What is the difference when the second polynomial is subtracted from the first?
Click here to see answer by richard1234(5390)  |
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610
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