If the amount of VAT paid for an item at 13% was Rs 390, at what price was the item sold?

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?

Write the equations in logarithmic form 10^3=1,000

Determine the area of a triangle with (see picture below)