12 points--geometry

as part of a science project, you need to estimate the number of blue spruce in a 50 acres forest. you count 36 trees in 3 acres and notice that the trees seem to be evenly distributed. estimate the total number of blue spruce trees in the forest.

Talia took the bus from her home to the bank and then walked back to her home along the same route. the bus traveled at an average speed of 40 km/h and she walked at an average speed of 5 km/h. to determine the time, x, that it took talia to walk home, she used the equation 40(0.9 – x) = 5x. the time of trip 2 is hours. the distance of trip 1 is km.