Decide whether or not the matrices are inverses of each other.
and 
A. Yes
B. No
Answer: B
Mathematics
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Find the limit.
A. 2/3 B. 0 C. -? D. ?
Mathematics
Solve the problem.The decibel level D of a sound is related to its intensity I by 
. If I0 is 10-12, then what is the intensity of a noise measured at 93 decibels? Express your answer in scientific notation, rounding to three significant digits, if necessary.
A. 1.09 × 1016 watt/m2 B. 2 × 10-3 watt/m2 C. 2 × 10-2 watt/m2 D. 9.3 × 10-10 watt/m2
Mathematics
Subtract.- 
- 
A. - 
B. - 
C. - 
D. 
Mathematics
Identify f as being linear, quadratic, or neither. If f is quadratic, identify the leading coefficient.f(x) = 2 - x + 5x2
A. Linear B. Quadratic; 5 C. Quadratic; 2 D. Neither
Mathematics