The function f of t represents the cost to connect to the Internet at an online gaming store. It is a function of t , the time in minutes spent on the Internet. f of t is equal to zero dollar when zero is less than t and t is less than or equal to thirty; f of t is equal to five dollars when thirty is less than t and t is less than or equal to ninety; f of t is equal to ten dollars when t is greater than ninety Which statement is true about the Internet connection cost?
Answer
A
It costs 5 dollars per hour to connect to the Internet at the gaming store.
B
It costs 10 dollars for each 90 minutes spent connected to the Internet at the gaming store.
C
Any amount of time over an hour and a half would cost 10 dollars .
D
The first half hour is free, and then it costs 5 dollars per minute to connect to the Internet.
Explanation
The cost is $0 for up to 30 minutes, $5 for more than 30 minutes through 90 minutes, and $10 for any time greater than 90 minutes. Since an hour and a half is 90 minutes, any amount of time over an hour and a half costs $10. The cost is not charged per minute, so choice D is not correct.
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