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The area of a circle in terms of the circumference |
2014-11-04 |
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Sarah pose la question :
How do you find the area of a circle if you already have the circumference?
There was one answer to this question already but it didn't make sense to
me, because they rounded up pi which you can't do so the answer is
incorrect. thanks
Penny Nom lui répond. |
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A quadratic function modelling the heightof a flea jump |
2014-11-02 |
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Hannah pose la question :
A flea jumps from the ground to a height of 30 cm and travels 15 cm horizontally from where it started. Suppose the origin is located at the point from which the flea jumped. Determine a quadratic function in vertex form to model the height of
the flea compared to the horizontal distance travelled
Penny Nom lui répond. |
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The density of sea sand |
2014-11-02 |
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Lenny pose la question :
Hi There,
I need to find out the the density of sea sand to convert one metric ton to cubic
meter as I am submitting for a tender which is in cubic meter but the requirement
is in metric ton. I searched through the web site but no density of sea sand is given
though there is specific Gravity of dry sand is available. I was given a density of
1.6 to work with. If that is true am I right to say that 1 cubic meter of sea sand is
equivalent to 1.6 metric ton? Please help as I am getting confused with what I am
able to find out on the web.
Thanks much in advance
Rgds
Lenny
Penny Nom lui répond. |
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4 card hands |
2014-11-02 |
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Ronaldo pose la question :
How many Mus hands (combination of 4 cards allowing repetitions)
can be made from a deck containing 8 types of cards?
RRRR, RRRC, RRRS, RRR7, RRR6, RRR5, RRR4, RRRA,
RRCC, RRCS, RRC7, RRC^, RRC5, RRC4, RRCA,
RRSS, RRS7, etc.
I think 330. If so, what is the formula?
Penny Nom lui répond. |
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Jason's speed |
2014-10-31 |
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jason pose la question :
the speed of Jason is 12 times faster than everyone. The speed of Jason is 108mph. Write the equation and solve to find the speed of everyone else.
Penny Nom lui répond. |
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Prime factorization in exponent form |
2014-10-31 |
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Emma pose la question :
I need to find out how to make a prime factorization of 120 in exponential form.
Penny Nom lui répond. |
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What is the speed of the boat in still water? |
2014-10-30 |
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Adam pose la question :
The current in a stream moves at a speed of 2 km/h. A boat travels 38 km upstream and 38 km downstream in a total time of 3 hr. What is the speed of the boat in still water?
Penny Nom lui répond. |
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Two quadratic polynomials |
2014-10-28 |
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khushboo pose la question :
The zeroes of a quadratic polynomial x^2+ax+b are 'c' and 'd'
and the zeroes of a quadratic polynomial x^2+cx+d=0 are 'a' and 'b'.
find the numerical value of a+b+c+d where a, b, c and d are non zero integers.
Penny Nom lui répond. |
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The region between two concentric circles |
2014-10-27 |
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Ray pose la question :
two circles, concentric; Given the length of chord of outer circle that is tangent to inner circle. what are the areas of both? how to calculate?
Penny Nom lui répond. |
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logbase4 (sin x) = -0.5 |
2014-10-26 |
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Susan pose la question :
Solve for x: logbase4 (sin x) = -0.5
Penny Nom lui répond. |
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6 bolt holes around a circle |
2014-10-26 |
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Bobby pose la question :
What Is The Cord Dimension For 6 Holes On A 24" Bolt Circule
Penny Nom lui répond. |
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Find the nth term |
2014-10-26 |
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Kenneth pose la question :
According to the pattern of the following sequence. Find it's nth term:
3,9,27,81,243,..........
Penny Nom lui répond. |
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Revolutions per minute |
2014-10-24 |
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Edward pose la question :
Hello; I have a 28.2 inch diameter tire; do not worry about engine RPM or gear ratios, please tell me what the RPM
of that tire is at 8 MPH and 64 MPH. Thank you.
Sincerely; Edward
Penny Nom lui répond. |
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A truncated square-based pyramid |
2014-10-22 |
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Beth pose la question :
How do you find the height of the original square-based pyramid when given the sides (12cm) of the base and height (6cm) of the truncated pyramid, as well as the sides (3cm) of the base of the chopped off top (chopped off parallel to the base)?
Penny Nom lui répond. |
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A 10-foot piece of PVC pipe |
2014-10-21 |
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David pose la question :
A plumber has a 10-foot piece of PVC pipe. How many 9/5-foot pieces can be cut from the 10-foot piece ?
Penny Nom lui répond. |
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