A room is 10 m long ,6 m wide and 4.2 m high .it has one door of 2.5 m × 1.5 m one window pic dimension 1.5m × 1 m. find the cost of whitewashing the walls at ₹ 2.50 per sq. m.

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?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

Identify the number as a rational or irrational.explain. 127