Lois is a self-employed pet sitter. She can make 20 “housecalls” per day. She is considering hiring her sister Dora to work for her. Both she and Dora can visit 35 houses per day. What is Dora’s marginal product?_________.
A: 22.5
B: 15
C: 55
D: 35
A: 22.5
B: 15
C: 55
D: 35
举一反三
- M: Dora, why were you late for class this morningW: I missed the bus. Why was Dora late() A: She didn’t know the time. B: She forgot her class. C: She didn’t catch the bus.
- 9. What is Dora doing now? A: She is getting the room ready for the birthday party. B: She is doing the washing-up with Keith. C: She is ironing the clothes. D: She is playing the bridge with her sister.
- A hiker walked for 3 days. She walked 18 miles on the first day, walking 3 miles per hour. On the second day she walked for one less hour, but she walked one mile per hour faster than on the first day. On the third day she walked the same number of hours as on the first day but at the same speed as on the second day. How many miles in total did she walk ？（） A: 24 B: 44 C: 58 D: 60 E: 62
- What does David say about Dora?[音频][音频] A: She is a vegetarian. B: She spends little on food. C: She is careful about what she eats. D: She likes celery better than anything.
- How does the author manage her daily life A: She canorder food on Net. B: She can manage her money on Net. C: She can love and work on Net. D: She can play piano on Net.