HELP PLEASE Which statement about population parameters and point estimates is false?
A. O is the population standard deviation. It is usually unknown.
B. X is the sample mean. It is used to estimate the population mean,
C. U is the sample standard deviation. It is the square root of the
variance
O D. n is the sample size. It is used to calculate the sample mean.

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Abucket of paint has spilled on a tile floor. the paint flow can be expressed with the function p(t) = 6(t), where t represents time in minutes and p represents how far the paint is spreading. the flowing paint is creating a circular pattern on the tile. the area of the pattern can be expressed as a(p) = 3.14(p)^2 part a: find the area of the circle of spilled paint as a function of time, or a[p(t)]. show your work. part b: how large is the area of spilled paint after 8 minutes? you may use 3.14 to approximate pi in this problem.

Abook store is having a 30 perscent off sale. diary of the wimpy kid books are now 6.30 dollars each what was the original price of the books