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The weight of some dirt |
2016-02-24 |
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From Michael:
How many tons of dirt are in a triangle 14M x10M x 8.1M x .8M deep?
Answered by Penny Nom. |
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Converting a fraction to a percentage |
2016-02-22 |
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From Preitty:
How can I turn fractions into percentages when the denominator is not a number that can multiply to 100?
Answered by Penny Nom. |
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How can I express Sin 4A in term of Sin A? |
2016-02-22 |
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From Odukoya:
How can I express Sin 4A in term of Sin A?
Answered by Penny Nom. |
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A bonus of 8% of sales |
2016-02-22 |
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From Barghavi:
A man earns $325 per week plus an additional 8% on any sales over $500.
If he makes $6,250 in sales, how much money in total does he earn that week?
thank you!
Answered by Penny Nom. |
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The evaluation of a 3 by 3 determinant |
2016-02-19 |
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From Kristen:
What is the step-by-step process on how to evaluate the determinant of a 3*3 matrix, using the expansion method (not the diagonal method)
Answered by Penny Nom. |
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The domain and range of a function |
2016-02-19 |
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From Genius:
State the domain and range
g(x)=x(x-1)
Answered by Penny Nom. |
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The interior and external angles of a regular polygon |
2016-02-17 |
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From percy:
a regular polygon has n sides .The size of each interior angle is eight times the size of each exterior angle .
1.find the size of each exterior angle
2.calculate the value of n
Answered by Penny Nom. |
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Shooting a ball at a target |
2016-02-16 |
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From Thys:
Hi
I have a problem with the formula that i use .(for programming)
I have looked all over the web to find a solution but no luck.
I have a cannon that shoots a ball at a target
I use this formula to calculate what my initial velocity must be to hit the target
at a angle of 30 degrees and a distance of 15m (the cannon and target position is known)
It works perfectly if both is at same height but if one is higher or lower it miss.
In an example I am working with the range is 30m, the angle is 45 degrees and the target is 10m higher than my position.
Please help
Formula = V0 = √RG / Sin(2α)
Answered by Harley Weston. |
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0/0 |
2016-02-14 |
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From Noni:
Q. 0÷0=1 Why it is wrong when 4÷4=1; 3÷3=1; 2÷2=1: 1÷1=1 ?
Answered by Penny Nom. |
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Speed and velocity |
2016-02-14 |
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From kechi:
A boat sails south through Chesapeake Bay. It takes 10 hours to sail 110 kilometers. Describe the boat's motion. Calculate the boat's speed and velocity, showing the calculations. Explain how the boat's speed is different from its velocity
Answered by Penny Nom. |
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Perpendicular lines |
2016-02-14 |
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From Brendon:
points A (-4; 6) , B (1;-2), C (5;-3) and D (4; 1) are given
prove that AC and BD are perpendicular to each other
Answered by Penny Nom. |
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Calendar arithmetic |
2016-02-14 |
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From Jenalee:
January 1, 2001 is Julian Day 2 451 911 (the number of days that have passed since Day 0, January 1, 4713 BC).
If Julian Day 0 was a Monday, what day of the week was January 1, 2001?
Answered by Victoria West. |
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Two equations in two unknowns |
2016-02-13 |
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From Anumba:
4x + 2y = 4
7x - y = -11
Answered by Penny Nom. |
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Todd is 3 years older than his brother Jack |
2016-02-13 |
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From Victoria:
Todd is 3 years older than his brother Jack. If Jack is x years old and Todd is y years old, write a rule that relates their ages over time. When Jack is 28 years old, how old will Todd be?
Answered by Penny Nom. |
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Travelling with and against he current |
2016-02-09 |
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From Lloyd:
A boat travelled 210 miles downstream and back. The trip downstream took 10hrs, the trip back took 70hrs
1. what is the speed of the current?
2. what is the speed of the boat in still water?
Answered by Penny Nom. |
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