a) substitution (refer to statements 1 and 2)
b) definition of supplementary
c) subtraction property of equality
The answer is B, 20 balls in 4 seconds. Or 5 balls per second.
Answer:
y=25600
y=100(2)^{2t}
y=252
Step-by-step explanation:
A bacteria culture starts with 100 bacteria and doubles in size every half hour.

where x represents the number of hours
(a) t= 4 hours
Plug in 4 for t and find out the number of bacteria y

25600 bacteria

convert 40 seconds into hour
40 divide by 60 =2/3

The graph is attached below