20. The rates(费用) at an Internet bar are as follows:
|
First
30 minutes |
$3.00 |
|
Every
additional(增加的) 15 minutes |
$2.00 |
How much does Ginny have to pay if she was on-line for 50 minutes?
A. $5 B. $7 C. $9
20. The rates(费用) at an Internet bar are as follows:
|
First
30 minutes |
$3.00 |
|
Every
additional(增加的) 15 minutes |
$2.00 |
How much does Ginny have to pay if she was on-line for 50 minutes?
A. $5 B. $7 C. $9