Find the volume of the water tank shown. Depth: 1.8 m
Diameter : 2.4m
Volume = ? m3 (nearest m3)

Step-by-step explanation:

r = d/2

r = 2.4 m/2 = 1.2

h = 1.8

pi = 3.14

Volume = pi * r^2 * h

Volume = 3.14 * 1.2^2 * 1.8

Volume = 8.139

Volume = 8 to the nearest m^3

For this case, what we are going to do is verify in which points the function is equal to zero.
 We have the points are:
 x = (-b +/- root (b ^ 2 -4 * a * c)) / (2 * a)
 We substitute the values in the equations shown and verify that the equality is met.
 For y = 2x2 + 8x - 5
 x1 = -2-root (13/2)
 x2 = root (13/2) - 2
 These roots coincide with the cut points of the graph on the x axis.
 
 The equation is:
 y = 2x2 + 8x - 5
 option 4