Find the cofactor of the indicated element of the matrix shown.a13;
A. -21
B. 21
C. -20
D. -3
Answer: B
Mathematics
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A. 
B. 
C. 
D. 
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Find y".y = 5 sin(2x + 8)
A. -20 sin(2x + 8) B. -20 cos(2x + 8) C. -10 sin(2x + 8) D. 10 cos(2x + 8)
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A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 45 cm/s. Express the radius r of this circle as a function of the time t (in seconds) and find A ? r, if A is the area of this circle as a function of the radius.
What will be an ideal response?
Mathematics
Provide an appropriate response.Most products follow the route of going from a manufacturer directly to a:
A. merchant B. consumer C. retailer D. wholesaler
Mathematics