Lisa takes a taxi uptown, and the fare is $12.78. She wants to give the driver a 10% tip. If Lisa gives the driver a $20 bill, how much change should she ask for?

$5.94

Step-by-step explanation:

You would divide 12.78 by 100 to get 1% then multiply it by 10 then add it to 12.78 the minus it from 20 and the answer is how much change she would need

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: