Answer:
Part a)
![\$190](https://img.qammunity.org/2020/formulas/mathematics/high-school/f8oa8nxho9x1kgp1beplkw8edbn6oy9gnv.png)
Part b)
![\$315](https://img.qammunity.org/2020/formulas/mathematics/high-school/qr6uktb9kan7xt1whoc2yip5ydso00uixf.png)
Part c) Standard Daily Rate plus Mileage plan
Explanation:
Part a) What would be the cost of the Standard Daily Rate plus Mileage plan?
Let
y ----> the total cost
x ----> the number of kilometers
we have that
For a Luxury car
![y=70+0.30x](https://img.qammunity.org/2020/formulas/mathematics/high-school/4ardecah6dqc2jaaky44cp7k7svt8tu3c4.png)
For x=400 km
substitute
![y=70+0.30(400)](https://img.qammunity.org/2020/formulas/mathematics/high-school/hw1oe45b9a0f152nw7tiqvb09vru0solp8.png)
![y=\$190](https://img.qammunity.org/2020/formulas/mathematics/high-school/lfzjt66xe5y870lu2wvepr2qf6czpbg72p.png)
Part b) What would be the cost of the Unlimited Mileage plan?
we know that
The Unlimited Mileage plan for a Luxury car is $105 per day (see the table)
The trip are three days
so
To find the total cost multiply $105 by 3
![3(\$105)=\$315](https://img.qammunity.org/2020/formulas/mathematics/high-school/x1mkn54okv67f008ly3nga2qgfkzqsjixi.png)
Part c) Which is the better plan?
Compare
![\$190 < \$315](https://img.qammunity.org/2020/formulas/mathematics/high-school/14haukmsmzoq8oo0010zc2093jk4pv0wqu.png)
therefore
For this trip the better plan is the Standard Daily Rate plus Mileage plan