Karl participated in a two-day charity walk. his parents donated money for each mile he walked. karl walked 2 1 4 miles on the first day and 5 1 2 miles on the second day. his parents donated $62. how much money did his parents pay for each mile?

$8/mile

Step-by-step explanation:

Total distance walked was 2  1/4 mi  +  5  1/2 mi = 7  3/4 mi.  Please note: you must use the " / " symbol to indicate division;  "2 1 4" is unclear.

                                           $62

Unit rate = $ per mile = = $8/mile

                                        7  3/4 mi

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m