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
Answer: B
Mathematics
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Refer to the equilateral triangle shown below and its six symmetries: ? r1 : reflection with axis l1 ? r2 : reflection with axis l2 ? r3 : reflection with axis l3 ? R1 : 120° clockwise rotation with rotocenter O ? R2 : 240° clockwise rotation with rotocenter O ? I : the identity symmetry
Which symmetry results when applying the symmetry r1 followed by R2 ?
A. R1 B. r1 C. R2 D. r2 E. r3
Mathematics
Write the following as an algebraic expression in u, u > 0.sin 
A. 
B. u
C. 
D. 
Mathematics
Express the radical in simplified form.
A. 6
B. 6
C. 36
D. 10
Mathematics
Express as a sum of logarithms.ln 6x
A. ln 6 + ln x B. ln 6x + ln x C. ln(6 + x) D. ln 6 - ln x
Mathematics