The quotient of 4.56 and 0.05 is 91.2
Answer:
Unit rate: $23.80
8 pairs: $190.40
Step-by-step explanation:
To find the unit rate, you divide $71.40 by three in order to get the cost of one.
71.4/3= 23.8
To get 8 pairs you multiply the unit rate by 8.
23.8*8= 190.4
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
ON = MN =x
ON² + MN² = OM²
x² + x² = 8²
2x² = 64
x² = 32
x = √32 = 4√2
THe answer is i dont know because you didnt post it :)
