Help !how to find the maintenance cost for second year? (1 Viewer)

[fabl]

From past records it has been found that the cost rate of maintaining a certain car is dc/dt = 75t^2 +50t + 800 where C is the accumulated cost in dollars and t is the time in years since the car was first used. Find:

the maintenance cost for the second year?

The answer is $1050 ?? but i got $1200

 

[InteGrand]

From past records it has been found that the cost rate of maintaining a certain car is dc/dt = 75t^2 +50t + 800 where C is the accumulated cost in dollars and t is the time in years since the car was first used. Find:

the maintenance cost for the second year?

The answer is $1050 ?? but i got $1200

Integrate dC/dt from 1 to 2 and you should get $1050.

i.e.