In general, the higher the gradient the less erosive energy there is.

If $10,000 now is equivalent to 4Z at the end of year 2, 3Z at the end of year 3, 2Z at the end of year 4 and Z at the end of year 5, what is the value of Z when the interest rate is 8% per year? So I already solved this using the discrete compounding tables. My solution was: P=z(P/G,8%,5)...

Find the gradient of the tangent to the curve y= square root x plus 8/square root x at the point (4,6)

I know how to find the gradient but the question gives a equation 2x - 5y = 18 how do I find x and why to draw a graph?

Hi there, How would I solve this? A tangent to the hyperbola y=1/(2x) , x>0 cuts the y- axis at the point y=2 Find the gradient of this tangent? If I differentiate the hyperbola, I would get -1/(2x^2) and then I don't know how to go on about doing it. Thanks