2part
what are two equivalent ratios to the ratio 20: 15? *
4: 3 & 12: 9
12: 9 & 6: 3
5: 3 & 12: 9
4: 3 & 5: 3
what are two equivalent ratios to the ratio 10: 35? *
5: 7 & 2: 6
20: 70 & 2: 7
20: 70 & 5: 6
5: 6 & 2: 7

Need on this one asap im almost done with this subject

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Gexpressions: practice question 3 of 5 jackson wants to study the popularity of his music video by tracking the number of views the video gets on his website. the expression below represents the total number of views that jackson's video receives n days after he begins tracking the nu views, where b is the rate at which the number of views changes. alb)" select the statement that would accurately describe the effect of tripling a, the initial number of views before jackson beginst the rate at which the number of views changes, b, will triple. the total number of views the video has after n days, a(b)", will not change. the total number of days since jackson begins tracking views, n, will be reduced by one-third. the total number of views the video has after n days, alb)", will triple. submit