Answer:
202.5
Step by step explanation:
4x45=180 (because 1in is equal to 45miles then you must multiply 4in times 45miles to find how much miles 4 inches are)
45/2=22.5 (45miles is divided by 2 because half of 45 miles is needed to find out what 1/2in is in miles)
180+22.5=202.5 (you must add them to get the total)