Answer:
60
Step-by-step explanation:
all of those rounded to the nearest ten is 60
You would do parentheses first and that answer you will x 7
33% because 66/200 is .33, and convert that to percentage by multiplying by 100
Make more sense ou of this question and I can help you out more ok?
Answer:
Negative controls are particular samples included in the experiment that are treated the same as all the other samples but are not expected to change due to any variable in the experiment.
Step-by-step explanation:
