Find the magnitude 
and direction angle ?, to the nearest tenth of a degree, for the given vector v. v = -3i - 4j
A. 5; 53.1°
B. 5; 216.9°
C. 7; 233.1°
D. 5; 233.1°
Answer: D
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The function s = f(t) gives the position of a body moving on a coordinate line, with s in meters and t in seconds.s = 3t - t2, 0 ? t ? 3Find the body's speed and acceleration at the end of the time interval.
A. 3 m/sec, - 2 m/sec2 B. 9 m/sec, -6 m/sec2 C. 3 m/sec, -6 m/sec2 D. -3 m/sec, - 2 m/sec2
Solve the system by the method of your choice. Identify systems with no solution and systems with infinitely many solutions, using set notation to express their solution sets.x - 4y = 3-5x + 20y = -15
A. {(0, 0)} B. {(3, 0)} C. {(x, y) | x - 4y = 3} D. ?
Use a combination of rules for exponents to simplify. Write answers with only positive exponents. Assume that all variables represent nonzero real numbers.
2
A. 
B. 
C. 
D. 
Solve.The population growth of an animal species is described by 
where t is the number of months since the species was introduced. Find the population of this species in an area 1 month(s) after the species is introduced.
A. 970 B. 505 C. 405 D. 790