Solve the problem.How many 3-digit numbers can be formed using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 if the first digit cannot be 0? Repeated digits are allowed.
A. 504
B. 810
C. 729
D. 900
Answer: D
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Find the slope of the linear regression equation for the following table of values. x 1.02 3.43 4.66 6.76 y 24.71 14.77 10.09 1.59
What will be an ideal response?
Solve.A whispering gallery is a room in the shape of an elliptic reflector. If a source of sound is placed at one focal point of an elliptic reflector, the sound is reflected through the other focal point. If one person speaks at one focal point, then another person at the other can hear sounds as faint as a whisper. If the whispering gallery is based on the ellipse 
+ 
= 1, how many units from the center of the ellipse would the two people stand?
A. 15 units B. 9 units C. 12 units D. 144 units
Multiply and simplify.
? 
A. 5
B. 
C. 
D. 10
Simplify the expression.125-4/3
A. 625
B. - 
C. -625
D. 