A park ranger spent $120 to buy 8 trees. Redwood trees cost $20 and spruce trees cost $12 each. How many of each tree did the park ranger buy?|

Is every rectangle is a parallelogram? true false

10 ! in a race, nick is 50 feet in front of jay after ten seconds. how fast can nick run, if jay can run 20 feet per second?

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882