n The diagram shows a circle drawn inside a square. The circle touches the edges of the square. 12cmCalculate the total shaded area. Take it to be 3.142 and write down all the digits given by your calculator.

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?