Drag each object to show whether cost is proportional to area in the situation represented.
Sod that is quoted at a set
price per square yard plus a labor fee
Hardwood flooring that costs
$16 for every 2 square feet
Pavers that cost a set
amount per square foot
Cost
($)
3.000
4.000
6.000
Area
(acres)
2
4
6
A concrete patio quoted at a
bulk cost for 50 square feet
Cost (5)
(0:0) 10 60
Area (yd)
Cost Is Proportional to Area
Cost Is NOT Proportional to Area
Not Enough Information

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.