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The area of a circle in terms of the circumference |
2014-11-04 |
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From Sarah:
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
Answered by Penny Nom. |
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A quadratic function modelling the heightof a flea jump |
2014-11-02 |
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From Hannah:
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
Answered by Penny Nom. |
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The density of sea sand |
2014-11-02 |
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From Lenny:
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
Answered by Penny Nom. |
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4 card hands |
2014-11-02 |
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From Ronaldo:
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?
Answered by Penny Nom. |
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Jason's speed |
2014-10-31 |
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From jason:
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.
Answered by Penny Nom. |
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Prime factorization in exponent form |
2014-10-31 |
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From Emma:
I need to find out how to make a prime factorization of 120 in exponential form.
Answered by Penny Nom. |
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What is the speed of the boat in still water? |
2014-10-30 |
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From Adam:
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?
Answered by Penny Nom. |
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Two quadratic polynomials |
2014-10-28 |
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From khushboo:
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.
Answered by Penny Nom. |
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The region between two concentric circles |
2014-10-27 |
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From Ray:
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?
Answered by Penny Nom. |
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logbase4 (sin x) = -0.5 |
2014-10-26 |
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From Susan:
Solve for x: logbase4 (sin x) = -0.5
Answered by Penny Nom. |
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6 bolt holes around a circle |
2014-10-26 |
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From Bobby:
What Is The Cord Dimension For 6 Holes On A 24" Bolt Circule
Answered by Penny Nom. |
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Find the nth term |
2014-10-26 |
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From Kenneth:
According to the pattern of the following sequence. Find it's nth term:
3,9,27,81,243,..........
Answered by Penny Nom. |
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Revolutions per minute |
2014-10-24 |
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From Edward:
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
Answered by Penny Nom. |
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A truncated square-based pyramid |
2014-10-22 |
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From Beth:
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)?
Answered by Penny Nom. |
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A 10-foot piece of PVC pipe |
2014-10-21 |
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From David:
A plumber has a 10-foot piece of PVC pipe. How many 9/5-foot pieces can be cut from the 10-foot piece ?
Answered by Penny Nom. |
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