3. Nina has $20.14 in her purse. She buys lunch
for $9.67. How much does she have left?

Nina has $10.47 left.

Step-by-step explanation:

$20.14 minus $9.67 is $10.47

$10.47

Step-by-step explanation:

Nina has $20.14.If she uses $9.67 for lunch then she would be left with($20.14-$9.67) which is equal to $10.47

a. the residual plot for model 1 has a random pattern and is a good fit for the data.

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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