Five friends went on a road trip and kept track of how long each of them spent driving.
what percent of the driving was done by sheng?
write your answer using a percent sign (%).

Given the choice between receiving $1.000.000 in one month or a single penny-doubled everyday for the period of one month; which option would you choice? show your work to support your answer. (assume that 1 month=30 days)

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.