Solve the problem.A collection of dimes is arranged in a triangular array with 15 coins in the base row, 14 in the next, 13 in the next, and so on with 1 dime in the last row. Find the value of the collection.
A. $12.00
B. $6.00
C. $1.20
D. $24.00
Answer: A
Mathematics
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Evaluate the integral by first performing long division on the integrand and then writing the proper fraction as a sum of partial fractions.
A. 2y2 - ln 
+ 4 ln 
+ C
B. 2y2 + ln 
+ ln 
+ C
C. 2y2 + ln 
+ (2y + 1) ln 
+ C
D. 2y2 + 4 ln 
+ ln 
+ C
Mathematics
Solve the equation.x - 
= -8
A. {6} B. {-6} C. {-5} D. {5}
Mathematics
Perform the indicated operation.
? 
A. 
B. x - 4
C. x + 4
D. 
Mathematics
Solve.In chemistry, the pH of a substance is defined by 
where 
is the hydrogen ion concentration in moles per liter. Find the 
of a sample of lake water whose hydrogen ion concentration, 
, is 
moles per liter. (Round to the
nearest tenth.) A. 6.4 B. 7.3 C. 10.1 D. 8.5
Mathematics