Solve the problem.Helen Weller invested $13,000 in an account that pays 3% simple interest. How much additional money must be invested in an account that pays 6% simple interest so that the average return on the two investments amounts to 4%?
A. $13,000
B. $10,000
C. $9000
D. $6500
Answer: D
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Solve the problem.The ellipse 
+ 
= 1 is shifted down 7 units and right 7 units. Find an equation for the new ellipse and find the new vertices.
A. 
+ 
= 1; vertices: (7, -7 ± 
)
B. 
+ 
= 1; vertices: (7 ± 
, -7 )
C. 
+ 
= 1; vertices: (7, -7 ± 
)
D. 
+ 
= 1; vertices: (7 ± 
, -7 )
Decide whether or not the given equation is an identity.(cos ? - sin ?)2 + (cos ? + sin ?)2 = 2
A. Yes B. No
Refer to a normal distribution described by the following figure. The mean is ? and the standard deviation is ?.
If the standardized value of x is -1.25, then x =
A. 62.5. B. 42.5. C. 65. D. 51.25. E. none of these
The circle graph shows the results of the student council presidential election and the percent of the vote each person received.
How many votes did Ming get?
A. 156 B. 120 C. 174 D. 150