Match each description below with the letter of the correct number set.
?
A. natural
B. whole
C. integer
A. {1,..., 3, 4, 5,...}
B. {0,..., 2, 3, 4, ...}
C. {..., –4, –3, –2,..., 0, ..., 2, 3, 4, ...}
Mathematics
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Integrate the given expression.
dx
A. x + 7C
B. -21x + C
C. 7x3 + C
D. - 
+ C
Mathematics
Solve the problem.In how many ways can the letters in the word GIGGLE be arranged?
A. 4320 B. 720 C. 120 D. 36
Mathematics
Find the requested average, and round your answer as indicated.The table below shows the square footage of homes of a group of families. Find the average square footage and round to the nearest tenth. 
A. 7960.0 square feet B. 15,929.0 square feet C. 9986.3 square feet D. 9986.4 square feet
Mathematics
Classify the angle as acute, obtuse, straight, or right.
A. Acute B. Right C. Straight D. Obtuse
Mathematics