Answer:
B) y=1/4x²
Step-by-step explanation:
Answer: a) 0.74, b) (0.70, 0.778)
Step-by-step explanation:
Since we have given that
Total number of chemical companies n = 500
Number of companies certified = 370
So, 
At 95% level of confidence, z = 1.96
So, interval would be

Hence, a) 0.74, b) (0.70, 0.778)
Answer:
8
Step-by-step explanation:
6^7 : 6^6 = 6^(7-6) = 6^1 = 6
3^3 : 3^4 = 3^(3-4) = 3^-1 = 1/3
6* 1/3 = 2
2^3 = 8
Answer:
5
Step-by-step explanation:
Because two times 5 equals ten