anna needed 20 pieces of wites, each of length 0.3m. the wires were sold in rolls of 2m each. what was the least number of rolls of wire that anna needed to buy?

1) find the total length of wire she needs

×

2) divide by how long each roll is

= 3 rolls

Anna needs to buy 3 rolls.

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation:

1. 3.4/4

2. 0.8/7

3. 0.5 x 3

4. 0.9 x 6

5. 10.8

6. 2.35

7. 0.567

8. 9.35

9. 0.02

10. 0.06

11. 0.16

12. 0.42

13. 0.63

14. 5.6

15. 8.1

16. 9.9

17. 0.28

18. 0.48

19. 0.27

20. 0.49

21. 0.45

22. 0.72

23. 0.9

24. 0.88

25. 0.75

26. 0.16

27. 0.328

28. 0.495

29. 0.72

30. 1.068