1.the new number , 200 , is 400 less than the original number . what is the precent change ?
a: 0.6%
b: 1.5%
c: 66%
d: 150%
2.the attendance at a seminar in year 1 was 500 . in year 2 , the attendance changes by 100 . what was the precent change in attendance?
a: 0.2%
b: 0.4%
c: 20%
d: 40%

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b. you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c. you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d. you spend $5 plus $10 per week until you have less than $45.

What is the common difference for this arithmetic sequence? -6,-2,2,6,10 a.4 b.5 c.3 d.6