Mrs. Jones's home is 3 mi from the library. The library is 2 mi from the bank, the bank is 4 mi from the grocery store, and the grocery store is 1 mi from Mrs. Jones's home. What is the distance Mrs. Jones traveled when doing her errands?

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up