Nine gallons of a sugar solution was mixed with 6 gallons of a 90 percent sugar solution to make an 84 percent sugar solution. Find the percent concentration of the first solution.
80%
79%
87%
75%

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.

answer: y = -2.5x - 15

              (-6,0)

step-by-step explanation:

im with everythinglos so yeahhhhh

step-by-step explanation: