To mix a certain shade of grey, the ratio of white paint to black paint is 4 to 3. Let w be the amount of white paint that is used in gallons) and b be the amount of black paint that is used in gallons).

a. Write a formula that determines the value of w in terms of the value of b.
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< i think this is the answer unless i did my math wrong

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So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho