7 L of an acid solution was mixed with 3 L of a 15% acid solution to make a 29% acid
solution. Find the percent concentration of the
first solution.

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step-by-step explanation:

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !

what is the original number? you forgot to add it.