Question 857205
r is speed of the single engine plane.
t is amount of time in hours but not any point on a time line.
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The basic uniform rates travel equation is represented as {{{highlight_green(R*T=D)}}} for rate, time, distance.


____________________rate_____________time___________distance___EQUATION
singleengine___________r________________t+4____________960________{{{r(t+4)=960}}}
jet_________________4r_______________t______________960________{{{4r*t=940}}}