If i have 500 dollars how much i need to make 1800 dollars

You have $500 and want/need $1800. You would subtract the amount you want with the amount you have.

1800-500=1300

You need to acquire $1300

The height reached by the ladder is 8 m.

Step-by-step explanation:

A 10 meter long ladder is leaning against the wall. The foot of the ladder is 6 meters from the wall. What height reaches the ladder on the wall?

Length of ladder, L = 10 m

foot of ladder, D = 6 m

Let the height reached is H.