The position of a model train, in feet along the railroad track, is given by $s ( t ) = 3.5 t + 3$ after t seconds.
Where is the train after 10 seconds
A)13 feet
B) 38 feet
C) 16.5 feet
D) 65 feet
E) 35 feet

Question

The position of a model train, in feet along the railroad track, is given by $s ( t ) = 3.5 t + 3$ after  t seconds.  
Where is the train after 10 seconds  
A)13 feet
B) 38 feet
C) 16.5 feet
D) 65 feet
E) 35 feet

Quizplus · Accepted Answer

To find the position of the train after 10 seconds, substitute $t = 10$ into the equation $s(t) = 3.5t + 3$. This gives $s(10) = 3.5(10) + 3 = 35 + 3 = 38$ feet.

The Position of a Model Train, in Feet Along the Railroad