### Home > CALC > Chapter 7 > Lesson 7.3.4 > Problem 7-149

7-149.

**Multiple Choice:**Two particles start at the origin and move along the*x*-axis. For 0 ≤*t*≤ 2*π*, the position functions are given by*x*_{1}= − cos(2*t*) and*x*_{2}=*e*^{(}^{t}^{−1)/4 }− 0.5. For how many values of*t*do the particles have the same velocity? Homework Help ✎0

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How many ways can you make *v*_{1} = *v*_{2}?