### Home > CALC > Chapter 11 > Lesson 11.1.3 > Problem 11-38

11-38.

**Multiple Choice:**A racer with a five foot head start runs with an acceleration of*a*(*t*) = 6*t*ft/sec^{2}. At*t*= 4 seconds, her velocity was 50 feet per second and she finished the race in 9 seconds. How long was the race? Homework Help ✎734 ft

737 ft

747 ft

750 ft

752 ft

Use *v*(4) = 50 to solve for *C*.

Use *d*(0) = 5 to solve for *C*.

Use your equation for *d*(*t*) to evaluate *d*(9).