Suppose you make a 4-minute local call using a calling card and are charged 7.6 cents....

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Suppose you make a 4-minute local call using a calling card and are charged 7.6 cents. The cost of a local call varies directly with the length of the call. How much more will it cost to make a 30-minute local call? Select one: a. More than $0.50. O b. $0.50 Oc. Not enough information is given. Od. Less than $0.50 Suppose you make a 4-minute local call using a calling card and are charged 7.6 cents. The cost of a local call varies directly with the length of the call. How much more will it cost to make a 30-minute local call? Select one: a. More than $0.50. O b. $0.50 Oc. Not enough information is given. Od. Less than $0.50