Emily and her sister earned money shoveling snow over winter break. Altogether they shoveled for a total of 40 hours. Jenna charged her customer $13 per sidewalk, and her sister charged $10 per sidewalk. If they earned $461.50 total, how many hours did each girl spend shoveling?

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.

If i purchase a product for $79.99 and two accessories for 9.99 and 7.00 how much will i owe after taxes applies 8.75%

Typically a point in a three dimensional cartesian coordinate system is represented by which of the following answers in the picture !