The outer radius of a cyrindrical metal tube is R and t is the thickness of the metal. a. Show that the volume V, of metal in a length, l units, of the tube is given by V =πlt(2R-t). b. Hence calculate V when R =7.5, t=1 and l = 20.​

Run a linear regression to determine an equation (y=mx+b y=mx+b)

Arepresentative from plan 1 wants to use the graph below to sell health plans for his company. how might the graph be redrawn to emphasize the difference between the cost per doctor visit for each of the three plans? the scale on the y-axis could be changed to 0–100. the scale on the y-axis could be changed to 25–40. the interval of the y-axis could be changed to count by 5s. the interval of the y-axis could be changed to count by 20s.

Answer asap! due in 30 minutes! ! 8th grade math