How many six-letter permutations can be formed from the first six letters of the alphabet?
Mathematics
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Solve the problem.If a projectile is fired at an angle ? and initial velocity v, then the horizontal distance traveled by the projectile is given by 
Express D as a function of 2?.
A. D = 
v2 sin 2?
B. D = 
v2 sin 2?
C. D = 
v2 sin 2?
D. D = 
v2 cos 2?
Mathematics
Represent the linear system as an augmented matrix. 6x + 4y = 60 9x + 3y = 81
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Find an expression that represents the area of the figure.(Leave ? in the answer.)
A. 36?t25 B. 36?t5 C. 12?t10 D. 36?t10
Mathematics
Solve. Round all dollar amounts to the nearest cent, if necessary.A population of bacteria increased from 80 million to 180 million. Find the percent increase.
A. 55.6% B. 125% C. 225% D. 69.2%
Mathematics