Verify the identity.
= tan 
cot 
What will be an ideal response?
= 
= 
? 
= tan 
cot 
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Solve the problem.The loudness of a sound can be approximated by the formula d = 10 log 
where d is the number of decibels. The higher the value of d, the louder the sound. Find the number of decibels when I = 10,000 and I0 = 1.
A. 10,000 B. 14 C. 10 D. 40
Evaluate the determinant by expansion by minors.
A. 5 B. -27 C. -23 D. 27
Set up the linear programming problem.Charlene baby-sits for $4 per hour. She also works as a tutor for $7 per hour. Because of school, her parents only allow her to work 13 hours per week. How many hours can Charlene tutor and baby-sit and still make at least $50 per week? (a) Let x = hours spent baby-sitting and let y = hours spent tutoring. Write a system of inequalities for this situation. (b) Graph the solution set. 
What will be an ideal response?
Write the standard form of the equation of the circle.Center (0, -9), r = 2
A. (x - 9)2 + y2 = 4 B. x2 + (y + 9)2 = 4 C. x2 + (y - 9)2 = 2 D. (x + 9)2 + y2 = 4