It takes Jilll 2 hours to run 14.5 miles. At this rate, how far could she run in 3 hours?

21.75 miles

Step-by-step explanation:

If in 2 hours she can run 14.5 hours. You divide 14.5 by 2 and get 7.25, that's the rate per hour. Then you multiply it by 3. 7.25 x 3=21.75

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

; )

step-by-step explanation: ; )