Alex and ben share £100 in the ratio 3:2

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

A20? -foot ladder is placed against a vertical wall of a? building, with the bottom of the ladder standing on level ground 19 feet from the base of the building. how high up the wall does the ladder? reach?

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?