Question

Lesson 2 semester B exam algebra 1B unit 7

Answer 1

Answer:

do you have all the answers for the exam, you can get 100 points

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Answer 2

Answer:

720 pounds

Step-by-step explanation:

Initially, we have that the amount of algae in the pond is $90pounds$. Every four hours the amount of algae doubles. If we called $t$ the time and $W$ the amount of algae, we have that:

$At \ t=0 \ hours, \ w=90 \ pounds \\ \\ At \ t=4 \ hours, \ w=2(90)=180 \ pounds \\ \\ At \ t=8 \ hours, \ w=2(180)=360\ pounds \\ \\ At \ t=12 \ hours, \ w=2(360)=720 \ pounds$

Finally, after 12 hours the amount of algae in the pond is 720 pounds