exam Maths Puzzle Numerical Ability

How would I solve this for kj?:

ln(kj/15) = 2ln(kj/60)

The answer is kj = 240, but I am unsure as to how to get there. Thanks for your help.

Read Solution (Total 0)

exam Other Question

Graph, on the number line, all points for which

[x+5] > 4
You have $22 in your bank account and deposit $11.50 each week. At the same time your cousin has $218 but is withdrawing $13 each week. Write and solve a system of equations to det