6500 pounds are necessary to cover 75000 square feet
Okay so the first one is right.
The second one is wrong.
the third one is right.
The forth one is wrong.
Idk, why does the world need problems like this, not like everyone is going to grow up to be a math teacher.
45 × 13 = 585
Which is exactly how much he'd need to pay back his sister and buy the bike. So, it would take him 13 weeks.