Tutors Answer Your Questions about Equations (FREE)
Question 196581: I keep getting the incorrect answer for this problem of 7.60 ft Can you help me?
Grain is falling from a chute onto the ground, forming a conical pile whose diameter is always three times its height. How high is the pile (to the nearest hundredth of a foot) when it contains 1030 ft^3 of grain?
thanks!
Click here to see answer by Alan3354(69443)   |
Question 196582: Hi!
I'm having some difficulty with the following problem:
If F is the focal length of a convex lens and an object is placed at a distance x from the lens, then its image will be at a distance y from the lens, where F, x, and y are related by the lens equation below. Suppose that a lens has a focal length of 2.1 cm, and that the image of an object is 4 cm closer to the lens than the object itself. How far from the lens is the object?
1/F = 1/x + 1/y
thanks!
Click here to see answer by jim_thompson5910(35256) |
Question 196582: Hi!
I'm having some difficulty with the following problem:
If F is the focal length of a convex lens and an object is placed at a distance x from the lens, then its image will be at a distance y from the lens, where F, x, and y are related by the lens equation below. Suppose that a lens has a focal length of 2.1 cm, and that the image of an object is 4 cm closer to the lens than the object itself. How far from the lens is the object?
1/F = 1/x + 1/y
thanks!
Click here to see answer by stanbon(75887) |
Question 196580: I'm having some difficulty with the following problem. I'm stuck in the middle of this problem.
Two television monitors sitting beside each other on a shelf in an appliance store have the same screen height. One has a conventional screen, which is 6 inches wider than it is high. The other has a wider, high-definition screen, which is 1.8 times as wide as it is high. The diagonal measure of the wider screen is 10 inches more than the diagonal measure of the smaller. What is the height of the screens, correct to the nearest 0.1 inch?
thanks!
Click here to see answer by stanbon(75887) |
Question 196609: this is a story problem. Figures for the summer of 1998 showed that the movie Saving Private Ryan had U.S. box-office receipts of $190 million. What were the production costs to make the movie if, at that time, the studio had made a $125 million profit?
Click here to see answer by vleith(2983) |
Question 196634: On the following I always get a no solutions answer, but its noted that their are real solutions in this problem. Can you help me?
Find all real solutions of the equation. (Round your answer to two decimal places. If there are extra answer boxes, enter NONE in the last boxes.)
3 / (x - 3) + 6 / (x^2) = 0
thanks!
Click here to see answer by jim_thompson5910(35256) |
Question 196647: I keep getting the incorrect answer to the following problem, I'm not sure where my error was, can you help me?
One method for determining the depth of a well is to drop a stone into it and then measure the time it takes until the splash is heard. If d is the depth of the well (in feet) and t1 the time (in seconds) it takes for the stone to fall, then d = 16t1^2, so t1 = √d/4. Now if t2 is the time it takes for the sound to travel back up, then d = 1090t2 because the speed of sound is 1090 ft/s. So t2 = d/1090. Thus, the total time elapsed between dropping the stone and hearing the splash is given by the following equation.
t1 + t2 = √d/4 + d/1090
How deep is the well if this total time is 2.3 s? (Round the answer to the nearest whole number.)
thanks!
Click here to see answer by jim_thompson5910(35256) |
Question 196647: I keep getting the incorrect answer to the following problem, I'm not sure where my error was, can you help me?
One method for determining the depth of a well is to drop a stone into it and then measure the time it takes until the splash is heard. If d is the depth of the well (in feet) and t1 the time (in seconds) it takes for the stone to fall, then d = 16t1^2, so t1 = √d/4. Now if t2 is the time it takes for the sound to travel back up, then d = 1090t2 because the speed of sound is 1090 ft/s. So t2 = d/1090. Thus, the total time elapsed between dropping the stone and hearing the splash is given by the following equation.
t1 + t2 = √d/4 + d/1090
How deep is the well if this total time is 2.3 s? (Round the answer to the nearest whole number.)
thanks!
Click here to see answer by Alan3354(69443) |
Question 196642: Hi
I'm having a hard time figuring out the answer to this problem:
Grain is falling from a chute onto the ground, forming a conical pile whose diameter is always three times its height. How high is the pile (to the nearest hundredth of a foot) when it contains 1030 ft^3 of grain?
Thanks!
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 196736: I need help to find the beginning equation the following word problem-Junior's boat will go 15 miles per hour in still water. If he can go 12 miles downstream in the same amount of time as it takes to go 9 miles upstream, then what is the speed of the current?
Click here to see answer by stanbon(75887) |
Question 196692: I'm coming up with the incorrect answer to the following problem. Can you assist me?
A large pond is stocked with fish. The fish population P is modeled by the formula P = 4t + 8√t + 110, where t is the number of days since the fish were first introduced into the pond. How many days will it take for the fish population to reach 500?
thanks!
Click here to see answer by scott8148(6628)  |
Question 196819: Hello!
I've been having some trouble with the following word problem
A large pond is stocked with fish. The fish population P is modeled by the formula P = 4t + 8√t + 110, where t is the number of days since the fish were first introduced into the pond. How many days will it take for the fish population to reach 500?
thanks!
Click here to see answer by jim_thompson5910(35256) |
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