Simplify the expression. Assume that all variables are positive when they appear.
A. 4x2y
B. 28xy
C. 2x2y
D. 2x4y2
Answer: C
Mathematics
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Evaluate the integral which is given in cylindrical or spherical coordinates.
A. 
B. 
C. 
?
D. 
?
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Determine whether the graph is a tree.
A. Yes B. No
Mathematics
Use the average daily balance method to compute the finance charge on the credit card for the previous month.Month: February (28 days)Previous month's balance: $1250Interest rate: 20%
A. $16.60 B. $14.55 C. $17.97 D. $7.56
Mathematics
Solve the problem.On the October 3 billing date, Violet had a balance due of $841.71 on her credit card. The transactions during the following month were: 
The interest rate on the card is 1.8% per month. Using the previous balance method, find the finance charge on November 3.
A. $20.30 B. $25.17 C. $15.15 D. $9.46
Mathematics