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Post New Question
All Questions
+0
234787 Questions
0
1160
1
Linear vs Nonlinear Functions
Can someone help me create an equation out of this?
A certain type of bacterial cell divides into two cells every hour. So, in a colony of these cells, the population doubles every hour.
Thanks in advance.
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Guest
Jan 6, 2014
0
673
3
+10
Help! need someone explain something simple???
The speed at which electrons moves through a semiconductor relates to their mobility, U. The
temperature dependence T of U is complicated but for many semiconductors, U shows the following
relationship:
U = kT^3/2
where k represents a collection
read more ..
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davidashworth7
Jan 6, 2014
0
1355
8
Sinusoids
Could someone explain sinusoids to me, I'm having trouble finding horizontal shifts and such just from looking at the equation. And I can't for the life of me figure out how to graph them. Thanks!
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Guest
Jan 6, 2014
0
603
2
algebra 2
Evaluate each expression if a = -5, b = 6 and c = 2.8.
6 - |3c + 7|
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Guest
Jan 6, 2014
0
682
1
PLOT
what is a plot of land to metre?
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Guest
Jan 6, 2014
0
672
1
Math puzzle
Help me solve this puzzle:
3 men bought a bottle of wine for 30 dollars. They paid 10 dollars each. When they left, the shopkeeper realized that the bottle only costed 25 dollars. So he sent a dude with the remaining 5 dollars. He kept 2 dollars and have
read more ..
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Guest
Jan 6, 2014
0
675
1
log
log of another base
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Guest
Jan 6, 2014
Jan 5, 2014
0
687
1
math
simplify 3(2x+1)-2(x-4)
kitty<3
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Guest
Jan 5, 2014
0
763
1
MATH
How would I round this number 567272.32484893
kitty<3
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Guest
Jan 5, 2014
0
734
2
trig
If sin (30) = 1⁄2 then the cosine of what angle will be 1⁄2?
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Guest
Jan 5, 2014
0
732
1
Geometry
in triangle ABC, angle A = angle B + 30 degrees and angle C = angle B +60 degrees. Find the measure of each angle.
kitty<3
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Guest
Jan 5, 2014
0
521
1
Simple math
3^x * x^2 - 3^x * x = 0
can someone help me out with this?
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Guest
Jan 5, 2014
0
625
1
Plotting A Circle
Im having problems plotting circles.
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Guest
Jan 5, 2014
0
676
1
+4
Geophysics
By using this equation 13.34 x +0.43 g/cm3 x 10km x 3.143 ( 0.5 +( tan-1( x/z)) /180
Show that the measured gravity anomaly of half slab b at x= -2 and x=2km
Are +80.9 and +99.3 mGal respectively
Please help!!!
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Mb1778
Jan 5, 2014
0
681
1
answer me!
what is the result of 25x(40-n)=(25x40)-(25x32):n ?
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Guest
Jan 5, 2014
+3
1578
16
+118654
Puzzles and stuff for the younger students - please join in.
Here is a puzzle but it is also very useful, now or later, if you want to factorise a trinomial.
What are 2 numbers that multiply to give 8 and add to give 6? this is an easy puzzle most of you could do it with your eyes closed.
If people cooperate
read more ..
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Melody
Jan 5, 2014
0
664
2
Logic puzzle
You run a store. You sell 5 phone cases for $12.99 each a day with 7% tax
tax on each. You also sell 1 phone a day for $299.99 with 9% tax. Lastly 3
chargers for $4.99 each with 5% tax. Your daily expense is $450.67. What
should be increased
read more ..
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Guest
Jan 5, 2014
+3
1124
2
+118654
Amazing birdlife. (but no maths)
Besides maths, I am also interested in natural things.
The last few days i have been really treated.
There was a bird making an almight ruckus in the gum tree at the front of my surburban house (in Sydney, Australia).
The bird was easy to find.
read more ..
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Melody
Jan 5, 2014
0
648
4
Puzzle
Use only the numbers 8163 to make a decimal and fraction closest to one. No repeats
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Guest
Jan 5, 2014
0
803
1
Math
0.41 un terminating to a fraction
kitty<3
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Guest
Jan 5, 2014
Jan 4, 2014
0
926
1
Take the month you were born in. Multiply it by 4, add 13, multiply by 25, subtract 200, add the day you were born, multiply by 2, subtract 40, multiply by
Take the month you were born in. Multiply it by 4, add 13, multiply by 25, subtract 200, add the day you were born, multiply by 2, subtract 40, multiply by 50, add the last two digits of your birth year, subtract 10500…. viola! Your birth date. Have fun and
read more ..
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Guest
Jan 4, 2014
0
700
1
Tolls
What is cost of tolls between 08054 and 34211?
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Guest
Jan 4, 2014
0
649
4
solve equation
2*(1+2*y)^(2/3)=(1*y)^(5/3)*.02^(.5)
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Guest
Jan 4, 2014
0
1329
1
+4
Vector algebra of tetrahedron
The vertex length of a tetrahedral geometry from the centre is 'a'. By constructing vecotrs show that resultant of any three vectors is equal and opposite to the fourth vector.
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mathy
Jan 4, 2014
0
664
1
probablity
three cards are drawn from an ordinary deck of 52 cards. Each card is replaced in the deck before the next card is drawn. What is the probability that at least one of the cards will be a spade
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Guest
Jan 4, 2014
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