Sherkyra8645

1). In 1968, vehicle emision standards allowed 6.3 hydrocarbons released per mile driven. By 1980, the standards allowed only 0.41 hydrocarbons per mile driven. What was the rate of change from 1968 to 1980?

2.) Bonnie is four years older than Clyde. Ten years ago she was twice his age. How old is Bonnie?

3). Sam rows up a river to camp in three hours. The next day he makes the return trip downstream in one hour. If he can row two mph in still water, how fast is the current?(The question was not answered last time).

4). At diving competiotion, Jan's first dive received 9 scores that averaged 9.0. To calculate her final score for the dive, the highest and lowest scores were removed and the average was taken of the remaining seven scores. If her final score was 9.1, wh...

Thank you! Would it be... 0.93?

Thanks.:)