SOLUTION: Mrs. Herrera is buying one piece of candy for each of the students who have 100% attendance. The number of students in Mrs. Herrera’s math classes that have perfect attendance

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Question 1195965: Mrs. Herrera is buying one piece of candy for each of the
students who have 100% attendance. The number of
students in Mrs. Herrera’s math classes that have perfect
attendance is 2 x sqrt(169)-1
. The candy costs $0.79 each, plus
7% tax. How much money does it cost for Mrs. Herrera to
purchase candy for her math students with perfect
attendance?
Ⓐ $19.75
Ⓑ $19.82
Ⓒ $20.45
Ⓓ $21.13
Found 2 solutions by Theo, MathTherapy:
Answer by Theo(13342)   (Show Source): You can put this solution on YOUR website!
2 * sqrt(169) - 1 is equal to 2 * 13 - 1 which is equal to 26 -1 which is equal to 25.
25 * .79 is equal to 19.75.
tax on 19.75 is .07 * 19.75 = 1.3825.
add that to 19.75 to get 21.1325.
round that to the nearest penny to get 21.13.
that would be selection D.

Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

Mrs. Herrera is buying one piece of candy for each of the
students who have 100% attendance. The number of
students in Mrs. Herrera’s math classes that have perfect
attendance is 2 x sqrt(169)-1
. The candy costs $0.79 each, plus
7% tax. How much money does it cost for Mrs. Herrera to
purchase candy for her math students with perfect
attendance?
Ⓐ $19.75
Ⓑ $19.82
Ⓒ $20.45
Ⓓ $21.13


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