Solve the problem.If the police have 7 suspects, how many different ways can they select 5 for a lineup?
A. 2520
B. 42
C. 21
D. 35
Answer: C
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Solve.An electron beam is made to perform a repeated unidirectional sweep across a phosphor-coated display panel by a time-periodic sweep voltage, V, given as V(t) = 60t -1 ? t < 1Find a0 (if it is not zero), three nonzero cosine terms (if they exist), and three nonzero sine terms (if they exist) of the Fourier series for the time-dependent voltage.
A. 120
B. 
C. 
D. 
Fill in the blank with one of the words or phrases listed below.
The number in a fraction below the fraction bar is called the 
.
A. exponent B. numerator C. denominator D. base
Solve.The planets in a certain solar system have a path that is an ellipse, with Star A as one of the foci. Planet X has a perihelion of 588.6 million miles and an aphelion of 631.8 miles. Find an equation for Planet X's orbit. Express your answer with a and b in millions of miles, rounded to the nearest tenth of a million.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Add.
A. 627 B. 426 C. 537 D. 516