Annie buys some greeting cards each card cost $1,45 she pays with a 20 doller bill

18.55

Step-by-step explanation:

she would get 18.55 back because if the total was 1.45$ and she paid with a 20$ bill then she would get 18.55 back because 20-1.45=18.55

1,150 give brainliest

step-by-step explanation

2r= 2300

r =1150

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: