To build a deck, Roberto needs to buy 180 screws. 9 posts, and 36 pieces of 1" by 6" lumber. He already had the rest of
the materials for the deck that he needs. The costs of buying the deck materials are shown in the chart below:
Material
Cost
What is the total cost to buy all of the deck
100 screw container
$6.99
materials that Roberto needs (excluding
1 post
$16.40
tax)? (NOTE: NO CALCULATOR ALLOWED!)
Set of 10 pieces of lumber $88.20

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.