01/05/14

how is the area of the circle calculated?
A rectangular plywood measures 2.1m by 70 cm . circular discs are to be cut out from the plywood of diameter 14 cm . how many discs can be cut and how much plywood will be left?
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01/04/14

intrest calculation
if David invest $1000 in an account paying an annual percentage rate of 12% compunded quaterly, how much would he have in your account at the end of 1 year, 10 year and 100 year?
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01/04/14

what is a pi ? how the area of a circle is calculated?
the diameter of a wheel car is 77cm. how many revolutions will it make to cover a distance of 72.6m?
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01/03/14

Calculating percentage and converting? Too long, so I put it in the description :)
Jenna sells Lemonade for $10 per glass. She offers a 20% discount. The price is recalculated then she offers an additional 10% discount. Aidan wants to match her deal by offering a single discount... more
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Expert Answers •4

01/03/14

A turbine was steadily producing 3 volts across a 30 ohm resistor over a period of 30 seconds. What is the power output?
I am not sure, but I believe the equation to calculate the power output is  Power(w) = V2/ R    
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01/03/14

total of 700 goats and sheep, if he sold 3/4 of goats and 400 sheeps he would have an equal number of goats and sheep left. how many more sheep than goats
A farmer had a total of 700 goats and sheep. If he sold 3/4 of his goats and 400 sheep, he would have an equal number of goats and sheep left. How many more sheep than goats did he have in the... more
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Expert Answers •4

01/03/14

Kepler's third law
Kepler's third law, T = √(Kr3), can be used to calculate the time it takes for a planet to complete one orbit of a star. The average radius of the planet's orbit in km is r, and K is a constant... more
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01/02/14

How do you substitute .05m+20+20=.10(m-100)+15+20
I need help substituting 
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01/02/14

Help to factor an expression
Please help me solve this expression to factor completely.             35g^2 + 6g -9           thank you
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Expert Answers •3

01/01/14

Which of the following?
Which of the following is true about the graph of y=ln abs(x^2-1) in the interval (-1, 1)?   a) It is increasing. b) It attains a relative minimum at (0, 0). c) It has a range of all real... more
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12/31/13

describe and correct error
  how do I describe and correct this error:      (3x - 2) (2x - 3)     =3x(2x-3) - 2(2x - 3)   =6x^2-9x-4x-6   =6x^2-13x-6   Thank you
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Expert Answers •2

12/31/13

The height in feet h of a water bottle rocket launched from a rooftop is given by the equation h = -16 t 2 + 320t + 32, where t is the time in seconds.
The height in feet h of a water bottle rocket launched from a rooftop is given by the equation h = -16 t 2 + 320t + 32, where t is the time in seconds. After the rocket is fired, how long will it... more
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12/31/13

Rationalize the denominator and simplify: cos^2x / 1 - sinx
This is for my trig class. Thanks for the help!
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Expert Answers •3

12/31/13

Multiply and simplify: (cscx + 1)(cscx - 1)
This is for my trig class. Thanks for the help!
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Expert Answers •1

12/31/13

Factor and simplify: sin^4x + (sin^2x)cos^2x
This is for my trig class. Thanks for the help!
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Expert Answers •1

12/31/13

Simplify sec^2x + csc^2x / csc^2x(1+tan^2x)
This is for my trig class. Thanks for the help!
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Expert Answers •2

12/31/13

which of the following types of quadrilaterals always has perpendicular sides?
what type of quadrilaterals has perpendicular sides.
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Expert Answers •1

12/31/13

Rationalize the denominator in the expression
Rationalize the denominator in the expression             -√2d   t =     ----             √a   Thank you in advance
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Expert Answers •2

12/30/13

15 – 6 ÷ 3 • 4
What is the order of operations?)
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Expert Answers •2

12/30/13

how to write an exponential function
Andrew measures the amount of a very unstable substance to be 100 moles.  The half-life of  this substance is 3 days (after 3 days, half is gone).   How will I write an exponenential function... more
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12/30/13

the vertex of the parabola below is at the point (4, -1). Which could be this parabola's equation?
I don't understand the question. What would the equation be for this vertex of the parabola? I'm doing Conic sections, and  I don't understand the question.
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12/29/13

evaluate expression
how do I evaluate the expressions, then write the answer in scientific notation?   1.  (4.2 x 10^2) (4.2 x 10^5)   2.  (2.5 x 10 ^-2)^4       write this number only in scientific... more
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12/29/13

simplify expressions
Please help solve these expressions.     p^-3 p^-2r^3     (5x^-7)^2   show steps.   thank you.
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Expert Answers •1

12/28/13

graph system of inequalites
How do I solve and graph this system of inequalities?                     y<= 3/2x + 3                   -y < 2x
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Expert Answers •2

12/27/13

If a Appointment was made three months before 2-25-14 what day was it when the appointment was made?
three months before 2-25-14 i made a appointment for the doctors, to go back 2-25-14. i would like to know what date i made the appointment that asked me to come back 2-25-14.
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