17
E. Coli is a type of bacteria that can cause dangerous health problems. It
doubles every 20 minutes.
Write an expression that can help you determine the number of bacteria
after t minutes.
b) Use your expression to determine the number of bacteria after
i) 5 hours
ii) 8 hours

Step-by-step explanation:

Expression: X = Bacteria  T = Minutes    20t = X

20(15) = X

20(24) = X

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!