5. Mr Lim's monthly salary is $2500. Every month, he spends a certain amount and saves the rest of the money. In May, he reduces his spending by 20% and his savings goes up by 80%.
How much does he spend and save each month originally?

45

step-by-step explanation:

smple

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.

practice. practice. practice.

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice