a bat chasing a moth emits a sequence of three chirps every 0.010 seconds and later hears the echos of the chirps as detailed in the diagram below. How far away is the moth when the bat hears the third echo?

Mrs. smith does her daily chores. she walks 5 m to the laundry room and then turns around and walks -14 m to the kitchen. the whole process takes her 11 minutes. what was her average velocity for these events? (choose more than 1) a. 1.48 m/s b. 0.212 m/s c. -0.136 m/s d. -0.0075 m/s