Let x, represent the number of minutes and y represents the number of gallons of water in the tub, then the ordered pairs (2, 30) and (5, 12) satisfies the equation.
Therefore the equation is given by: (y - 30)/(x - 2) = (12 - 30)/(5 - 2)
(y - 30)/(x - 2) = -18/3 x = -6
y - 30 = -6(x - 2) = -6x + 12
y = -6x + 42
Required equation is y + 6x = 42.
Let 4 + 3x = u
then 3dx = du
or, <span>1/3∫<span>u√</span>du
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= <span>1/3<span>u^<span>3/2</span></span>/(3/2)
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= <span>2/9∗(4+3x<span>)^<span>3/2
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2.5 hours and you’re welcome