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A box full of oranges |
2010-10-28 |
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From Mary:
A box full of oranges weighs 9 pounds. After a family ate 2/3 of the oranges, the remaining oranges and the box weighed 4 pounds. The weight of the box when empty is how many pounds?
Answered by Penny Nom. |
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sin14.5/a = sin150/280 |
2010-10-26 |
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From ken:
how do you do the steps to this equation. sin14.5/a = sin150/280 the text book answer is 140.21 miles ,but how do the steps?
Answered by Penny Nom. |
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I have a sign size regulation I have to meet. |
2010-10-26 |
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From Scott:
I have a sign size regulation I have to meet. The size is .6 meters squared. at first look this would be 2 ft x 2 ft.
I believe it would be larger then that. Can you confirm what the size would be in inches please.
Answered by Penny Nom. |
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The game of 24 |
2010-10-26 |
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From gabrielle:
What is the answer using the numbers 0 0 0 0 (trig and calc are
allowed, all math is allowed) in the game 24?
Answered by Claude Tardif. |
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A train passes a car |
2010-10-24 |
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From Mary:
A train, whose speed is 75 mph, takes 3 minutes to pass a car that is going 60 mph in the same direction. How long is the train?
Answered by Stephen La Rocque. |
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The base of an isosceles triangle |
2010-10-24 |
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From Brian:
how can I find the base of an isosceles triangle from the height and the perimeter?
Answered by Penny Nom. |
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Convert to multiplication |
2010-10-23 |
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From angelina:
how to covert 5+5+5=15 to multiplication
Answered by Penny Nom. |
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A polynomial with integer coefficients |
2010-10-23 |
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From Adori:
Question from Adori, a student:
Find a polynomial with integer coefficients that has the given zeros: 2/3, 4, root of 3i, root of -3i.
Answered by Harley Weston. |
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a^(2^n) |
2010-10-22 |
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From Tim:
I am trying to understand a^(2^n).
The hint they give is a^(2^(n+1)) = (a^(2^n))^2
I am writing a program that will solve a^(2^n) recursively but need to
understand the power before I begin.
I am currently pursuing writing (a) x (a^(2^(n-1))) where the
(a^(2^(n-1))) would be the recursive function call a n approaches 0.
Once n is 0, the result would be multiplied by a two more times.
Anyway, explaining these powers would be appreciated. I will most likely
complete the program before the answer but I want to understand the
logic of these powers. Thank you, Tim
Answered by Stephen La Rocque. |
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A water trough |
2010-10-22 |
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From Jasmine:
A water trough is 8 m long and its cross-section is an isosceles
trapezoid which is 90 cm wide at the bottom and 120 cm wide
at the top, and the height is 30 cm. The trough is not full.
Give an expression for V , the volume of water in the trough in cm^3,
when the depth of the water is d cm.
Answered by Stephen La Rocque. |
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Four consecutive integers |
2010-10-21 |
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From Mickey:
Find four consecutive integers such that the sum of the first three integers is 20 more then the fourth integer.
I know that for consecutive integers the algebraic expression is x+x+1+x+2+x+3
Answered by Penny Nom. |
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A rectangle with rounded corners |
2010-10-21 |
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From Connie:
How do you find surface area if the rectangle is 100ft. by 200ft. with quarter circles in the corners with a radius of 20ft. ?
Answered by Penny Nom. |
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What are the speeds of the boats? |
2010-10-21 |
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From Adori:
Two boats leave the port of San Francisco traveling in opposite directions at the same time. One boat travels 8 knots per hour faster than
the other. After one day's travel they are 1920 nautical miles apart. What are the speeds of the boats?
Answered by Penny Nom. |
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John and Mary are 200 miles apart |
2010-10-20 |
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From Sarah:
two people, john and mary, are 200 miles apart and leave at the same time to meet.
They are driving toward each other at constant rate on the same straight road.
John is traveling at 45 mph and Mary is traveling at 35 mph.
When they meet, how many miles will they be from john's house?
Answered by Penny Nom. |
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Cleaning a ditch |
2010-10-20 |
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From bill:
how many yards of dirt will be removed from a ditch 200 feet long
6 feet wide at top x 3 feet wide at bottom and 4 foot slopes
Answered by Penny Nom. |
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