ani69
05.12.2019 •
Mathematics
Whoever answers this gets the brainliest !
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Ответ:
Ответ:
Area
= (22 cm) * (3.5 cm) + (22 cm) * (2.5 cm)
*Use distributive rule
= (22 cm) * (3.5 cm + 2.5 cm)
= (22 cm) * (6 cm)
= 132 cm²
Ответ:
0.0478
Step-by-step explanation:
We solve using z score formula
z = (x-μ)/σ, where
x is the raw score = 135 mm
μ is the population mean = 130 mm
σ is the population standard deviation.
We are given variance = 9
Standard deviation = √variance = √9 = 3
Hence
z = 135 - 130/3
z = 1.66667
Probability value from Z-Table:
P(x<135) = 0.95221
P(x>135) = 1 - P(x<135) = 0.04779
Approximately to 4decimal places = 0.0478