The concentration of a certain chemical in a full
water tank depends on the depth of the water. At a
depth that is x feet below the top of the tank, the
concentration is 3+ (4/ sq rt(5-x)) parts per million, where
0 < x < 4. To the nearest 0.1 foot, at what depth is
the concentration equal to 6 parts per million?
(A) 2.4 ft
(B) 2.5 ft
(C) 2.8 ft
(D) 3.0 ft
(E) 3.2 ft
ans :'e'
some help pls...
water tank depends on the depth of the water. At a
depth that is x feet below the top of the tank, the
concentration is 3+ (4/ sq rt(5-x)) parts per million, where
0 < x < 4. To the nearest 0.1 foot, at what depth is
the concentration equal to 6 parts per million?
(A) 2.4 ft
(B) 2.5 ft
(C) 2.8 ft
(D) 3.0 ft
(E) 3.2 ft
ans :'e'
some help pls...
