Aisha has a pet golden retriever named Lucky. She walks Lucky every night. Yesterday, Aisha and Lucky took a 45-minute walk and walked 3 miles. Today, Aisha plans to walk Lucky for only 30 minutes.
If they keep the same pace, how many miles will Aisha and Lucky walk today?
If they took a 45-minute walk yesterday and walked 3 miles, their walking pace is 3 miles/45 minutes = 1 mile/15 minutes.
Today, Aisha plans to walk Lucky for only 30 minutes, so they will walk 1 mile/15 minutes * 30 minutes = <<1/15*30=2>>2 miles. Answer: \boxed{2}.