During the past half hour, a restaurant has had 23 orders for pepsi and 15 orders for mountain dew. how many more orders have there been for pepsi than for mountain dew?

7 more orders
5 more orders
8 more orders
12 more orders

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How do i work this problem out using the equation a=pe^rt

Which conjunction is disjunction is equivalent to the given absolute value inequality? |x+2|< 18

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?