Which of the following transformations are linear? A. T(f(t))=f(3) from P5 to ℝ B. T(f(t))=8(f(t))2+6f(t) from C[infinity] to C[infinity] C. T(f(t))=f′(t)+8f(t) from C[infinity] to C[infinity] D. T(f(t))=f′(t)+7f(t)+4 from C[infinity] to C

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?