Answer:
125
Step-by-step explanation:
Area of trapezoid =
Bases = 11 and 14
(11+14)=25
25/2=12.5
12.5 x 10 = 125
In the diagram below, PA= 4, AB=2, and PC=3. Findthe length of PD.
1 answer:
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Answer:
Population after
Step-by-step explanation:
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Answer:
<h2>11.2≤Step-by-step explanation:
Confidence interval for the population mean is expressed by the formula;
CI = xbar ± Z(S/√n) where;
xbar is the sample mean = 12.5
Z is the z score at 99% confidence = 2.576
S is the standard deviation = √variance
S = √2.4 = 1.5492
n is the sample size = 25
Substituting the given values into the formula given above,
CI = 12.5 ± 2.576(1.5492/√25)
CI = 12.5 ± 2.576(0.30984)
CI = 12.5 ± 0.7981
CI = (12.5-0.7981, 12.5+0.7981)
CI = (11.2019, 12.7981)
Hence the 99% confidence interval for the population mean is 11.2≤12.8 (to 1 decimal place)