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777dan777 [17]
3 years ago
7

at an airport it costs 7 dollars to park for up to one hour and five dollars per hour for each additional hour. let x represent

the number of hours parked . write the function function that models the cost of parking x hours, where x is an integer greater than one
Mathematics
1 answer:
ivann1987 [24]3 years ago
6 0
I came up with 7+5(x-1)
7 is a fixed one time cost. 
5(x-1). x-1 because you have already charged $7 for the first hour.

Checking to make sure it is correct
so if a person stays 1 hour
7+5(1-1)
7+5(0) = 7     
This answer makes sense because they get charged $7 the first hour

so say they stay 3 hours
7+5(3-1)
7+5(2) = 17
This answer makes sense because they get charges $7 for the first hour and $5 for the other 2. so 7+5+5=17.

we can see that the function works
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Answer:

The PV of an ordinary annuity with 10 payments of $2,700 if the appropriate interest rate is 5.5% is $20,352.

Step-by-step explanation:

P = PMT [(1 - (1 / (1 + r)^{n})) / r]

= 2,700 [(1 - (1 / (1 + 0.055)^{10})) / 0.05]

= 2,700 [(1 - (1 / (1 + 0.055)^{10})) / 0.05]

= 2,700 [(1 - (1 / (1.708)) / 0.05]

= 2,700 [(1 - 0.58)) / 0.05]

= 2,700 [(0.41457) / 0.05]

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=$ 20,352

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3 years ago
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Slav-nsk [51]

Answer:

155.7

Step-by-step explanation:

Use what you know.

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