Answer:
12 seconds.
Step-by-step explanation:
If you put it like 15/9 = 20/x, then cross multiply and divide you do 9 times 20 you get 180, then you divide 180 by 15 and you get 12. Hope this helps!
1. 7.05
2. 18.075
3.4.0375
4.135/68
Answer: the answer is $63.14.
I took the test and got it correct.