To kim practice for the special olympics, sally runs beside him for half the required distance. she runs the remaining distance at her regular speed and arrives 90 seconds ahead of kim. what is the ratio of sally's regular speed to kim's speed?

Barrett is comparing the membership fees for two museums.the art museum charges a one-time fee of $8.25 plus $2.25 per month. the science museum charges a one-time fee of $10.75 plus $3.50 per month. how much does barrett save by joining the art museum instead of the science museum?