Answer: 340
Step-by-step explanation:
Because if you multiply 0.34x 10 to the 3rd power you get 340
Hope This helped :))
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
Difference means subtraction 14,505-282=14,223ft
Im not really sure so ill just give it a try.
mayeb 70? ten less"
