Answer:

Step-by-step explanation:
- Re-write the expression:
÷
- 31/6 ÷ 7/10 = 31/6 × 10/7
×
- 310/42 = 155/21
I hope this helps!
first you will need to find his speed = 0.4 mph (that's really slow, idk if i was wrong)
next up, it will take him about: 40 ÷ 0.4 = 100 hours for him to drive 40 miles
Answer:
C
Step-by-step explanation:
the explanation is there :)
hope this helps <3
Answer:
B and C are similar to A but E is same as A.
Answer:
2.7930 × 
Step-by-step explanation:
1.9 × 105 × 140 = 27,930
Scientific notation: 2.7930 × 