Compute the determinant of the matrix by cofactor expansion.

A. -28
B. -100
C. 36
D. -36


Answer: D

Mathematics

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The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = 8 sin t - cos tFind the body's velocity at time t = ?/4 sec.

A. -   m/sec
B.   m/sec
C. -   m/sec
D.   m/sec

Mathematics

For the measured quantity, state the set of numbers that is most appropriate to describe it. Choose from the natural numbers, integers, or rational numbers.The lengths of randomly cut pieces of string measured to the nearest inch

A. Integers B. Natural numbers C. Rational numbers

Mathematics

Solve the problem.There were 5 yards of fabric on a bolt. After a customer bought  of fabric, how many yards were left?

A. 6 yd
B. 1 yd
C. 3 yd
D.  yd

Mathematics

Solve the equation. If the equation has no real solution, so state. = 4

A. q = 
B. q = 16
C. q = 4
D. q = 

Mathematics