Question

Oscar and Kim have $22.00 each to spend at a book fair, where all students receive a 30% discount. They both want to purchase a copy of the same book, which normally sells for $28.50 plus 10% sales tax. To check if he has enough to purchase the book, Oscar takes 30% of $28.50 and subtracts that amount from the normal price. He takes 10% of the discounted selling price and adds it back to find the purchase amount. Kim takes 70% of the normal purchase price and then computes 110% of the reduced price. Is Oscar correct? Is Kim correct? Do they have enough money to purchase the book? Explain your answer using complete sentences, and show your work.

Answer 1

Can some one help me on this Q

Answer 2

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Answer 3

Hi and welcome to QuestionCove!
We can do some calculations to find out what values Oscar and Kim end up with, based on the instructions in the question
Oscar first takes 30% of the original price 28.50 and subtracts it from that price. 28.50*0.3 is 8.55. 28.5 - 8.75 is 19.95. Then, Oscar takes 10% of the discounted price, which would be about 1.99 (or 2.00, rounding up) and adds it to the discounted price. The final result is 21.94 or 21.95, both of which are less than 22.00.

Using Kim's method, we multiply the original price 28.50 by 0.7 to get 19.95. Then multiply this amount by 1.10 to get 21.95

Both methods give us the same result, and they are both valid approaches and both the correct result. According to their calculations, 22 dollars should be just enough for them to get they book they want

Answer 4

Thank you so much