Answer:
.
Step-by-step explanation:
Area of a circle using the radius is pi*r^2, so:
A=3.14*4^2
A=3.14*16
A=50.24
Answer:
18,502 no se no entendi muy bien
Step-by-step explanation:
Answer:
(-8,2)
Step-by-step explanation:The y-value does not change, only the x-value becomes positive.
Given:
μ = $3120, population mean
σ = $677, population standard deviation.
The population is normally distributed.
n = 20, sample size.
At the 95% confidence level, the confidence interval is

1.96(σ/√n) = 1.96(677/√20) = 296.71
Th confidence interval for the mean is
($2823.29, $3416.71)
Answer: ($2823.29, $3416.71)