Please help me I don’t get it

Step-by-step explanation:3.we need to find the map size based on actual miles. so, we find how many map ft are 1 actual mile :5 ft / 20.5 corresponds to 1 actual mile.5 / 20.5 = 10/41 ftnow, we have 15.5 actual miles, that is 15.5 times the 1 standard actual mile.and so, this is10/41 × 15.5 = 155/41 = 3.7804878048780... map ft4.30.5 model cm = 70.6 actual m1 model cm = 70.6/30.5 = 2.314754098... actual m.8 model cm = 8×2.314754098... = = 18.51803279... actual m5.7 map m = 14 actual miles 1 map m = 14/7 = 2 actual miles. 14 map m = 14×2 = 28 actual miles.6.8 map km = 6 actual mileswe need to calculate the map km, so we need the standard actual mile1 actual mile = 8/6 = 4/3 = 1.3333333... map km.50.2 actual miles = 50.2×1.333333... = = 66.93333333... map km.7.80.2 model cm = 40.2 actual m1 model cm = 40.2/80.2 = 0.501246883... actual m10 model cm = 10×0.501246883... = = 5.01246883... actual m8.6 map m = 15 actual miles1 map m = 15/6 = 5/2 = 2.5 actual miles8.8 map m = 8.8×2.5 = 22 actual miles9.5 map ft = 16.5 actual miles1 actual mile = 5/16.5 = 0.303030303... map ft45.6 actual miles = 45.6×0.303030303... = = 13.81818181... map ft10.65.8 model cm = 95.6 actual m1 model cm = 95.6/65.8 = 1.452887538... actual m12 model cm = 12×1.452887538... = = 17.43465046... actual m