Answer:
A. Used to keep track of very large and very small numbers during mathematical calculations.
Step-by-step explanation:
Some very large and small numbers are not easily represented in mathematical calculations. Using scientific notations help us to represent very large and small numbers to the power of 10.
Change the 30% into a decimal
so its .3
then multiply 2075/.3
and you get $622.50
Answer:
Looks like <u>inverse property of addition </u>to me
Answer:
11. 10/9 = 80/72
12. 8/12 = 72/108
13. 22/99 = 2/9
14 4 41/123 = 4 1/3
15. 84/840 = 1/10
16. 6/14 vs 3/7 (cross multiply numerators and denominators)
42 vs 42
Therefore 6/14 = 3/7
17. 2/3 vs 5/7 (cross multiply numerators and denominators)
14 vs 15
Therefore 2/3 < 5/7
18. 1/5, 1/2, 1/4 (Change to decimals then compare)
.20 .50 .25
Therefore increasing order is 1/5, 1/4, 1/2
19. 5/7, 5/6, 7/9 (Change to decimals then compare)
.71 .83 .77
Therefore increasing order is 5/7, 7/9, 5/6
Step-by-step explanation:
