Astore owner paid $15 for a book she marked up the price of the the book by 40% to determine its selling price part a what is the selling price of the book? part b a customer buys a different book that has an original selling price of $38 the book is discounted 25% the costumer must pay 6% sales tax on the discounted price of the book .what is the total amount the customer must pay for the discounted book

Part A: $21 Part B: $30.21

Step-by-step explanation:

Part A: First, just multiply 15 to 40 divided by 100. 15 x 40/100

40/100= 0.4. 15 x 0.4=6. 15+6=$21

Part B: Discount the book by 25% and then add the sales tax which is 6% and then the answer would be $30.21.

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step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function