The value in dollars v(x), of a certain truck after x years is represented by the equation v(x)= 32,500(0.92) raised to the x power. to nearest dollar, how much is the truck worth after 2 years than after three years

The 32,500 is the original cost of the truck and the (0.92) You take v(x)=32,500(0.92)
 and raise that to the 2nd power, to represent the 2nd year and you will get an answer of $27,300. 
Each year the truck is losing $2,600 in value, after two years the truck has lost $5,200 in value equalling
= $27,300

Num of plants = (original#ofplants)*(1.6)^t