4. bake sale ashley has $15 in the pep

club treasury to pay for supplies for a

chocolate chip cookie bake sale. the

function d = 15 - 0.08c represents the

dollars d left in the club treasury after

making c cookies. find the zero and

describe its meaning in the context of the

situation? identify the domain and range

and explain their significance.

a) 187.5 b) Domain c ∈ [0,187.5] c) Range ∈ [0,15]

Step-by-step explanation:

a) In this function, d stands for dollars and c stands for cookies. Ashley left $15 to pay supplies for making new cookies. The more cookies they made the less money it is left. For instance, If someone bakes 1 cookie using that money:

d=15-0.08c d=15-0.08(1) d=14.92 Then $14.92 is left after baking 1 cookie. And so on.

To find the zero of this function, let's turn this into an equation.

So according to this function, with 15 dollars at least 187 cookies can be made.

b) The function d=15-0.08c if it was defined for the Real Set, any value would be valid within the Real Set. But c, is for cookies. Then the set is

Domain c ∈ [0,187.5]

c) The Range

The Range is the subset of all values between $15 and 0$, since after the money is over they can no longer bake cookies. And there's $-1 dollar note.

So  the Range is d ∈ [0,15]