Write the equation of the ellipse with foci at 
, 
and 
style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_9508de9bdce74e7d9b58abf4c" />.
?
A. 
?
B. 
C. 
D. 
E. none of these
Answer: A
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Solve the problem.A summer camp wants to hire counselors and aides to fill its staffing needs at minimum cost. The average monthly salary of a counselor is $2400 and the average monthly salary of an aide is $1100. The camp can accommodate up to 45 staff members and needs at least 30 to run properly. They must have at least 10 aides, and may have up to 3 aides for every 2 counselors. How many counselors and how many aides should the camp hire to minimize cost?
A. 12 counselors and 18 aides B. 35 counselors and 10 aides C. 27 counselors and 18 aides D. 18 counselors and 12 aides
Determine the coefficient and degree of the monomial.-1.6x4y6z7
A. coefficient: -1.6, degree: 17 B. coefficient: -1.6, degree: 4 C. coefficient: 17, degree: -1.6 D. coefficient: -16, degree: 10
Find the 5th term in the binomial expansion.
?
What will be an ideal response?
Provide an appropriate response.An investor purchased 500 shares of a stock at $19 per share. The commission she paid to buy the stock was $65 plus 0.3% of the principal amount. Six months later she sold the stock for $20.50 per share. If she paid the same rate of commission to sell the stock, what annual rate of interest (annual yield) did she earn on her initial investment (including purchase price plus commission)? Express your answer as a percentage, correct to one decimal place.
Fill in the blank(s) with the appropriate word(s).