A cone-shaped table centerpiece has a diameter of 14 cm and a slant height that measures 31 cm. What is the surface area of the
centerpiece? (Use 3.14 for Pi and round to the nearest hundredth. Recall the formula S A = pi r l + pi r squared.)
681.38 cm2
835.24 cm2
1,362.76 cm2
1,978.20 cm2
681.38 cm2
835.24 cm2
1,362.76 cm2
1,978.20 cm2
2 answers:
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Answer:
(0.6430, 0.8170)
Step-by-step explanation:
Given that during a recent drought a water utility in a certain town sampled 100 residential water bills and found out that 73 of the residences had reduced their water consumption over that of the previous year.
Sample size n = 100
Sample proportion p =
q = 1-p = 0.23
Std error of proportion =
95% Z critical value = 1.96
Margin of error =
Confidence interval = sample proportion ±margin of error
0.642983946
0.817016054
(0.6430, 0.8170)