Answer:
Step-by-step explanation:
circumference of cylinder = πd = 5π in
lateral area of cylinder = 5π×9 = 45π in²
Each colored face has a matching face on the other side of the figure.
green areas = 2(17×15) = 510 in²
blue areas = 2(12×17) = 408 in²
gray areas = 2(5×6) = 60 in²
yellow areas = 2(5×12) = 120 in²
red areas = 2(12×15) = 360 in²
total surface area = 45π + 510 + 408 + 60 + 120 + 360 ≅ 1,599.37 in²
Answer:
Step-by-step explanation:
Given : Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is normally distributed and that σ = 4 psi.
A random sample of 8 specimens is tested, and the average breaking strength is found to be 98 psi.
i.e. n= 8 and
Critical value for 95% confidence =
Confidence interval for population mean :-
i.e.
Hence, a 95% two-sided confidence interval on the true mean breaking strength. =