Ella bought 8 keychains. She spent 4 dollars on each KeyChain. Hope this helps
A job is an example of employment
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:
C
Step-by-step explanation:
Because you should be subtract each other by 20x to transfer from side to another side.
A.would be 50 cents and im not entirely sure about b but i think its 8
