Determine if the matrix is in row-echelon form.
A. Yes
B. No
Answer: A
Mathematics
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Solve the problem.Find a parametrization for the ellipsoid 
+ 
+ 
= 1. (Recall that the parametrization of an ellipse 
+ 
= 1 is x = 7 cos ?, y = 8 sin ?, 0 ? ? < 2?).
What will be an ideal response?
Mathematics
Use the quotient rule to simplify the expression. Write the answer with only positive exponents.
A. -1017
B. 
C. 
D. 1011
Mathematics
Solve the problem. Assume that simple interest is being calculated in each case. Round your answer to the nearest cent.Robert Hall opened a maid service company. To pay for startup costs, Robert Hall borrowed $87,000 from a bank at 6% for 1 year. Find the interest.
A. $522.00 B. $6090.00 C. $92,220.00 D. $5220.00
Mathematics
Evaluate the expression.cot 270°
A. 
B. Undefined
C. 0
D. -1
Mathematics