Questions: Write a linear cost function for the following situation. Identify all variables used.
A ski resort charges a snowboard rental fee of 40 plus 8.50 per hour.
Identify all variables used. Choose the correct answer below.
A. C(t) represents the cost for renting t snowboards.
B. C(t) represents the number of snowboards that can be rented for t dollars.
C. C(t) represents the number of hours the snowboard was used after renting a snowboard for t dollars.
D. C(t) represents the cost of renting a snowboard for t hours.
A linear cost function for the situation is C(t) =
(Use integers or decimals for any numbers in the expression.)
Transcript text: Write a linear cost function for the following situation. Identify all variables used.
A ski resort charges a snowboard rental fee of $\$ 40$ plus $\$ 8.50$ per hour.
Identify all variables used. Choose the correct answer below.
A. $C(t)$ represents the cost for renting $t$ snowboards.
B. $\mathrm{C}(\mathrm{t})$ represents the number of snowboards that can be rented for $t$ dollars.
C. $\mathrm{C}(\mathrm{t})$ represents the number of hours the snowboard was used after renting a snowboard for $t$ dollars.
D. $\mathrm{C}(\mathrm{t})$ represents the cost of renting a snowboard for $t$ hours.
A linear cost function for the situation is $C(t)=$ $\square$
(Use integers or decimals for any numbers in the expression.)
Solution
Solution Steps
Step 1: Identify the correct variable interpretation
The question asks to identify the correct interpretation of the variables. The correct interpretation is:
\( C(t) \) represents the cost of renting a snowboard for \( t \) hours.
This corresponds to option D.
Step 2: Write the linear cost function
The ski resort charges a fixed fee of \$40 plus \$8.50 per hour. The linear cost function is:
\[
C(t) = 40 + 8.50t
\]
where:
\( C(t) \) is the total cost,
\( t \) is the number of hours the snowboard is rented.
Step 3: Verify the function
The function \( C(t) = 40 + 8.50t \) correctly represents the cost of renting a snowboard for \( t \) hours, with a fixed fee of \$40 and an additional \$8.50 per hour.
Final Answer
The correct answer is D.
The linear cost function for the situation is \( C(t) = 40 + 8.50t \).
\(\boxed{C(t) = 40 + 8.50t}\)