118 belongs in a. rational numbers
Answer and Step-by-step explanation:
From 14 to 24 is 10; from 24 to 34 is 10, and so on, so the common difference is 10.
f(1) = 14
f(2) = 24 = 14 + (2-1)(10) = 14 + (n-1)(10)
So f(n) = 14 + (n-1)(10)
Check: Does f(4) come out to 44, as we expected?
Does 14 + (4-1)(10) = 44? Yes.
Answer:
<u>The correct answer is D. Any amount of time over an hour and a half would cost $10.</u>
Step-by-step explanation:
f (t), when t is a value between 0 and 30
The cost is US$ 0 for the first 30 minutes
f (t), when t is a value between 30 and 90
The cost is US$ 5 if the connection takes between 30 and 90 minutes
f (t), when t is a value greater than 90
The cost is US$ 10 if the connection takes more than 90 minutes
According to these costs, statements A, B and C are incorrect. The connection doesn't cost US$ 5 per hour like statement A affirms, the cost of the connection isn't US$ 5 per minute after the first 30 minutes free as statement B affirms and neither it costs US$ 10 for every 90 minutes of connection, as statement C affirms. <u>The only one that is correct is D, because any amount of time greater than 90 minutes actually costs US$ 10.</u>
