The first thing you need to do is add and then subtract
Answer:
B. 95% confident the average concentration of PCBs in the water supply is between 2.9 ppb and 3.5 ppb
Step-by-step explanation:
You are given the total number of samples, the concentration of lead, and the standard deviation. The standard deviation represents how inaccurate the estimation of the concentration of lead in the drinking water. This means that there can only possibly be a 0.3 ppb error in the estimation. 3.2-0.3=2.9, and 3.2+0.3=3.5
Answer:
-3
Step-by-step explanation:
Answer:
it's obtuse. reason being cause to be acute it has to be under 90 and to be right it has to be at 90
Answer:
10.0683760684
Step-by-step explanation:
