Alan

If you are unable to plot them then take the differences of successive y-values and divide by the corresponding differences of the x-values.  If the resulting values are all the same they represent a linear function, otherwise they represent a non-linear function.

sqrt(27a^9)  →  sqrt(9*3*a^8*a)  →  sqrt(3^2*(a^4)^2*3a)  →  3a^4*sqrt(3a)

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If we assume Kallamoar meant that the diagonals intersect at T, then using the fact that the diagonals of a parallelogram bisect each other we have:

Y = 4X + 1                  (1)

2Y = 3X + 12              (2)

Subtract eqn(2) from 2*eqn(1):     0 = 5X - 10   so   5X = 10   or  X = 2

Substitute this into eqn(1) to get   Y = 4*2 + 1    or  Y = 9

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This might help:

(I used Mathcad to do the calculations).

m/s is a measure of velocity; m/s² is a measure of acceleration, so the two are different.  They are related by the fact that acceleration is the rate of change of velocity with time.

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You should be able to use the answer given at: http://web2.0calc.com/questions/the-monthly-demand-for-garlic-sold-by-the-sighisoara-softneck-garlic-cooperative-is-known-to-be-normally-distributed-with-a-mean-of-12190-bulbs-and-a-standard, by just changing the numbers appropriately.

In the testing phase of golf b***s, manufacturers generate robot controlled shots and analyse the results of such shots by the flight distance which is measured to a high accuracy.

It was found that the mean length of a large number of robot controlled shots using the Titleist Pro V1x golf ball is 229.424 metres and the standard deviation is 15.953 metres.Assuming that the lengths are normally distributed, find the proportion of robot controlled shots that measure between 224 and 265 metres. Supply your answer correct to three decimal places

For this one you first need to enter 265 in the top box and leave the second box empty then press calculate to get:

Now clear the second box and enter 224 in the top box and press calculate to get:

Take the difference between 0.98713 and 0.36693 to get the required proportion; namely 0.620 (to 3 dp).

This might also help:

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Enter the following data:

Press the calculate button to fill in the top box

There must be 11615 bulbs in stock.

The normal distribution with mean 12190 and standard deviation 251 has 1.1% (0.011) of its area below 11615.  

The online normal distribution calculator at http://stattrek.com/online-calculator/normal.aspx should enable you to answer this.