Acylindrical oil tank 8 ft deep holds 620 gallons when filled to capacity. how many gallons remain in the tank when the depth of oil is 3 and one half ft.

  271.25 gal

Step-by-step explanation:

Assuming the tank is oriented so that the quantity of oil is proportional to depth, the amount remaining is ...

  (3 1/2 ft)/(8 ft) × (620 gal) = 271 1/4 gal

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)