Assignment: ½
crosswise
Answers should be in complete sentences.
(a) Ruby and Daisy use prepaid cell phone cards to make phone
calls. Last year, after several rollovers of their remaining balance, they were
able to make a donation to the Red Cross through their cell phone use savings.
Their combined donation was not more than Php200. Ruby’s donation was Php20
more than Daisy’s. What was the maximum
amount that Daisy donated?
(b) The perimeter of a square is not more than 80 cm. What is the
largest possible area of the square?
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