Aplane flies round-trip to philadelphia. it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour. if the total trip takes 6.5 hours, how many miles does the plane fly round-trip?
a. 560 miles
b. 800.8 miles
c. 1,300 miles
d. 1,601.6 miles

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Jimmy can run 3.5 miles in 20 minutes. how far can ne run in one hour and ten minutes?

Is there a direction u in which the rate of change of f(x,y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.