Tutors Answer Your Questions about Average (FREE)
Question 487753: Respected Sir ,
Please help me to solve this question, I will be very grateful for your help
If there are two groups with 75 and 65 as harmonic means and containing 15 and 13 observations then the combined HM is given by
As the answer given is : 70.36
Please help me to simplify this !!!
Click here to see answer by ikleyn(53339)   |
Question 1174226: A ladder 4m long at a construction site is resting against a wall. The bottom of the ladder is slipping away from the wall. Find the estimate of the instantaneous rate of change of the Height H of the top of the ladder with respect to the Distance D of the bottom of the ladder from the wall when the bottom of the ladder is 2.5m away from the wall. Use h = 0.01 as the central interval.
Click here to see answer by ikleyn(53339) |
Question 1174226: A ladder 4m long at a construction site is resting against a wall. The bottom of the ladder is slipping away from the wall. Find the estimate of the instantaneous rate of change of the Height H of the top of the ladder with respect to the Distance D of the bottom of the ladder from the wall when the bottom of the ladder is 2.5m away from the wall. Use h = 0.01 as the central interval.
Click here to see answer by CPhill(2138)  |
Question 1151755: Two faulty tennis ball machines start to shoot balls from opposite sides of a 25
meter by 10 meter tennis court. The green ball machine shoots green balls that
stop on the court 5 meters to 20 meters from the green machine's side. The
yellow ball machine shoots yellow balls that stop on the court 2 meters to 16
meters from the yellow machine's side. Find the area of the tennis court that has
balls of either color on it.
Click here to see answer by ikleyn(53339) |
Question 1151755: Two faulty tennis ball machines start to shoot balls from opposite sides of a 25
meter by 10 meter tennis court. The green ball machine shoots green balls that
stop on the court 5 meters to 20 meters from the green machine's side. The
yellow ball machine shoots yellow balls that stop on the court 2 meters to 16
meters from the yellow machine's side. Find the area of the tennis court that has
balls of either color on it.
Click here to see answer by hudikamo(4) |
Question 1165911: The Sugar Sweet Company is going to transport its sugar to market. It will cost $4050 to rent trucks, and it will cost an additional $150 for each ton of sugar transported.
Let represent the total cost (in dollars), and let represent the amount of sugar (in tons) transported. Write an equation relating to , and then graph your equation using the axes below.
i also need to graph it and im not sure how....
Click here to see answer by hudikamo(4) |
Question 1210267: Matthias and Klara live in a high-rise building. Klara lives 12 floors above Matthias. One day, Matthias climbs the staircase to visit Klara. When the amount of floors he has traveled equals the number of remaining floors, he is on the 8th floor. On which floor does Klara live
Click here to see answer by ikleyn(53339) |
Question 1210267: Matthias and Klara live in a high-rise building. Klara lives 12 floors above Matthias. One day, Matthias climbs the staircase to visit Klara. When the amount of floors he has traveled equals the number of remaining floors, he is on the 8th floor. On which floor does Klara live
Click here to see answer by josgarithmetic(39675) |
Question 1166599: You have $500,000 saved for retirement. Your account earns 3% interest.
How much will you be able to pull out each month, if you want to be able to take withdrawals for 25 years?
Round your answer to the nearest dollar.
$____
Click here to see answer by ikleyn(53339) |
Question 1179470: Sam owns a triangular piece of land on which the taxcollector wishes to determine the correctproperty tax. Sam tells the collector that “the firstside lies on a straight section of road and the secondside is a stone wall. The wall meets the road at a24-degree angle. The third side of the property isformed by a 180-foot-long fence, which meets the wallat a point that is 340 feet from the corner wherethe wall meets the road.” After a little thought,the tax collector realizes that Sam’s descriptionof hisproperty is ambiguous, because there are still twopossible lengths for the first side. By means ofa cleardiagram, explain this situation, and calculate thetwo possible areas, to the nearest square foot.
Click here to see answer by CPhill(2138) |
Question 1184365: In January of 2017, you planted a rare variety of tomato. In 2 month time, you recorded the number of tomatoes harvested every week from various plots. Your data contained
140, 140, 100, 120, 110, 130, 110, 110, 140, 100, 130, 80.
A. Find the mean, mode, median and range for your data set of number of tomatoes. B. If the number of tomatoes doubles each week in the year 2017, what will be the mean, mode, median and range for the 2017 data? C. If, instead, there are five more tomatoes per week in the year 2017, what will be the mean, mode, median and range for the 2017 data?
Click here to see answer by CPhill(2138) |
Question 1186499: The safe load LF a wooden beams to put it up both and varies jointly as the wet W in the square of the deputy and inversely as the length , l . a wooden beams 7 inches wide 9 inches deep and 7 feet long holds up 39701 pounds what load will they be 9 inches wide 6 inches deep and 18 foot long of the same material support round your answer to the nearest integer if necessary
Click here to see answer by greenestamps(13248)  |
Question 1186499: The safe load LF a wooden beams to put it up both and varies jointly as the wet W in the square of the deputy and inversely as the length , l . a wooden beams 7 inches wide 9 inches deep and 7 feet long holds up 39701 pounds what load will they be 9 inches wide 6 inches deep and 18 foot long of the same material support round your answer to the nearest integer if necessary
Click here to see answer by ikleyn(53339) |
Question 1197912: The heights of adult men in America are normally distributed, with a mean of 69.3 inches and a standard deviation of 2.68 inches. The heights of adult women in America are also normally distributed, but with a mean of 64.5 inches and a standard deviation of 2.59 inches.
a) If a man is 6 feet 3 inches tall, what is his z-score (to two decimal places)?
z =
b) If a woman is 5 feet 11 inches tall, what is her z-score (to two decimal places)?
z =
c) Who is relatively taller?
-The 5 foot 11 inch American woman
-The 6 foot 3 inch American man
Click here to see answer by onyulee(41) |
Question 1207848: The length of a rectangle is 5 feet more than three times the width. The perimeter of the rectangle is 146 feet. What is the width and the length of the rectangle? State what x represents, state the equation, and then state the answer.
Click here to see answer by ikleyn(53339) |
Question 1207848: The length of a rectangle is 5 feet more than three times the width. The perimeter of the rectangle is 146 feet. What is the width and the length of the rectangle? State what x represents, state the equation, and then state the answer.
Click here to see answer by Edwin McCravy(20077)  |
Question 1205910: It takes 3 people 4 days to build a garage.
A) How long does it take one person to build the garage?
B)How long does it take four people to build the garage?
C)How many people are needed to build the garage in 2 days?
Click here to see answer by ikleyn(53339) |
Question 1205795: What is the median of 80,80,80,80,80,85,85,85,85,85,90,90,90,90,90
Click here to see answer by greenestamps(13248) |
Question 1205795: What is the median of 80,80,80,80,80,85,85,85,85,85,90,90,90,90,90
Click here to see answer by math_tutor2020(3827) |
Question 1205795: What is the median of 80,80,80,80,80,85,85,85,85,85,90,90,90,90,90
Click here to see answer by MathLover1(20854)  |
Question 1204991: A teacher wants to calculate the average score of her students. She has the scores of 20 students, but she accidentally misplaced one score. If the average of the remaining 19 scores is 85, what should be the misplaced score to maintain a weighted mean of 87?
Click here to see answer by greenestamps(13248) |
Question 1204991: A teacher wants to calculate the average score of her students. She has the scores of 20 students, but she accidentally misplaced one score. If the average of the remaining 19 scores is 85, what should be the misplaced score to maintain a weighted mean of 87?
Click here to see answer by mananth(16949)  |
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