A scientist models the number of grams of a radioactive substance with the expression 15•(1/2)^d/5, where d is the number of days since the sample was measured.
Math
1. After how many days has half of the substance disappeared through radioactive decay?

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Arestaurant needs to buy thirty-seven new plates. if each box has five plates in it, how many boxes will they need to buy?

Apolynomial function has a root of –6 with multiplicity 1, a root of –2 with multiplicity 3, a root of 0 with multiplicity 2, and a root of 4 with multiplicity 3. if the function has a positive leading coefficient and is of odd degree, which statement about the graph is true?