In how many ways can a husband and wife choose 2 different dinners from a menu of 13 dinners?
Fill in the blank(s) with the appropriate word(s).
156
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Use special right triangles to evaluate the expression.cot 
- sin 
A. - 
B. 
C. - 
D. 
Solve the problem.Arches in the shapes of parabolas are often used in construction. Find the equation of a parabolic arc that is 26 feet high at its highest point and 30 feet wide at the base, as illustrated in the figure. Place the origin at the midpoint of the base.
A. y = -x2 + 30
B. y = -x2 + 26
C. y = - 
x2 + 26
D. y = 
x2 + 26
Find the sum. 
+ 
A. 
B. 
C. 
D. 
Solve.The population of an endangered species living in a controlled habitat is given by the equation
where P is the population and t is the time in months since the population was moved to the habitat. Graph the equation for t = 0, 6, 12, and 18.
A. 
B. 
C. 
D. 