Bµi 2: T×m gi¸ trÞ LN – NN cña c¸c hµm sè: a) 1 1
2 + +
+ = x x
x
y . b) y = 2 1 5
1
+ x .

Perform the indicated operation. 8/a - 6/a + 7/a

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?