Mashaal Masha
$s=40+3t$

The equation gives the speed $s$, in miles per hour, of a certain car $t$ seconds after it began to accelerate. What is the speed, in miles per hour, of the car $5$ seconds after it began to accelerate?
Difficulty: Easy
A: 

40

B: 

43

C: 

45

D: 

55

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