A bridge that crosses a river 16 feet wide requires 4 reels of cable, 7.5 ten-foot steel rods, 3.012 pounds of
bolts, and 18.25 hours to assemble. If a bridge were to
be built across the Mississippi River (1,600 feet wide),
how much of each of the following items would be
needed: pounds of bolts, ten-foot steel rods, reels of
cable, and hours to assemble?

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

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

For what value of (y) is 3^3/3^y =1/9