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Fractions and negative powers |
2019-09-22 |
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From Will:
-2/3 to the -6 power
Answered by Penny Nom. |
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Bearings |
2019-09-22 |
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From Jean:
X is due north of Y and 2km distant. Z is due east of Y and has a bearing of S35°12'E from X. How far, to the nearest metre, is Z from X? Will you help me solve this problem?
Answered by Harley Weston. |
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The volume of a fire hose |
2019-09-18 |
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From Carlou:
How many liters of water in a 2.5 inches diameter of fire hose with a 20 meters in length
Answered by Penny Nom. |
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4" x 4" square tiles |
2019-09-18 |
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From Jill:
how many 4" x 4" square tiles would I need for 50 square feet?
Answered by Penny Nom. |
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Why does the circle have a larger area? |
2019-09-16 |
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From A student:
given a circle and square of same perimeter, why does the circle have a larger area
I’m looking for an intuitive explanation rather than a computational one. Thanks
Answered by Harley Weston. |
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Mandy walks to work |
2019-09-15 |
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From Kenneth:
Mandy walks to work at a constant rate. One-third of the way to work, she passes a bank.
Three-fourths of the way to work, she passes a book store.
At the bank her watch reads 7:52 A.M., and at the book store it reads 8:02 A.M.
At what time is Mandy one-half of the way to work?
Answered by Harley Weston. |
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A one foot rise in water level |
2019-09-15 |
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From Stuart:
If a lake were to rise one foot - how many linear feet would it spread onto the shore line ?
What is the correlation - 1 foot of a rise = 10 feet onto the shore ? Does it depend on the lake
size - if so Lake Ontario in Canada.
Answered by Penny Nom. |
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The amount of concrete in a foundation |
2019-09-11 |
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From Lorinda:
How do you calculate ( in cubic yards) how much concrete is needed for the foundation of a rectangular building 40 ft by 85 ft if the foundation walls are 8 inches thick and 7 ft 6 inches high?
Answered by Penny Nom. |
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What is -5 squared? |
2019-09-10 |
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From Pori:
What is -5 squared?
Answered by Penny Nom. |
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The number of integers that satisfy some conditions |
2019-09-10 |
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From Ryu:
Using only the digits 0 1 2 3 4 5 6 7 8 9 without repetition, how many integers are:
(a) Greater than 999, less than 10,000, start with an even digit and are even?
(b) Greater than 999, less than 10,000, start with an odd digit and are odd?
(c) Greater than 999, less than 10,000, start with an even digit and are odd?
(d) Greater than 999, less than 10,000, start with an odd digit and are even?
Answered by Penny Nom. |
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Problem solving |
2019-09-08 |
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From Arunsi:
When a fifth of a certain number is added to 3 the result is 17. What is the number?
Answered by Penny Nom. |
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Vectors |
2019-09-06 |
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From Kayla:
Hi!
Due to time constraint issues, we skipped vectors in Pre-Calc last year. However, I'm attempting to complete my AP Physics summer homework and there are 3 problems with vectors. As I explained, I have no idea even where to begin and as such I need some help.
Problem 1:
A plane flying at 90° at 45 m/s is blown toward 0° at 62 m/s by a strong wind. Find the plane's resultant velocity.
I have tried all sorts of online calculators but none are providing me with a formula I can use to solve this problem on my own.
Problem 2:
If you walk 367 m North and 785 m West what is your total displacement from your original location?
What is the problem asking for when it says displacement?
Problem 3:
A plane travels on a heading of 127.0° at a velocity of 25 km/hr. What are the horizontal and vertical components of the plane's velocity?
As you know already, I have never done vectors so I don't know what horizontal and vertical components of velocity are.
Thank you So Much for your help!! I am struggling!!
- Kayla
Answered by Penny Nom. |
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Using the Laws of Exponents |
2019-09-06 |
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From Samiya:
i have been struggling with the laws of exponents so im having trouble with this question. the
question is to write (b*exponent2*c)(b*exponent5*c*exponent4*)
Answered by Penny Nom. |
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Average savings |
2019-09-06 |
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From Puchu:
A student was saving an average of £2 per week for 25 weeks. He then found a part time job and after total of 45 weeks his average savings rose to £9 per week
How much did he save over 20 weeks after finding job?
Answered by Penny Nom. |
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The volume of a berm |
2019-09-06 |
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From John:
I need to construct a berm:
8' tall
5' across the top
20' at the base
125' long
How much soil will I need
Answered by Harley Weston. |
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