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2 answers:
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Answer:
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]
