State whether the square root is rational or irrational. If the square root is rational, find the (exact) value. If the square root is irrational, estimate its value by rounding to the second decimal place.
A. Rational; 20
B. Irrational; 12.37
Answer: B
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Solve the problem.For the vectors u and v with magnitudes 
= 5 and 
= 6, find the angle ? between u and v which makes 
= 3
A. 60.00° B. 53.13° C. 33.56° D. 36.87°
Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 
A. Domain: all points in the xy-plane; range: all real numbers; level curves: parabolas 
B. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: parabolas 
C. Domain: all points in the xy-plane except y = 0; range: real numbers z ? 0 ; level curves: parabolas 
D. Domain: all points in the xy-plane except y = 0; range: all real numbers; level curves: parabolas 
Find the best buy (based on cost per unit).There are 3 available long distance calling cards. ABC Phone charges $.01 per minute and a $0.50 connection charge.Bozo's Telecom charges $.025 per minute and a $0.15 connection charge.BT&T charges $.06 per minute and no connection charge.Which company has the best buy for a 15 minute phone call?
A. Bozo's Telecom B. BT&T C. ABC Phone D. Not enough information
Find the indicated sum. Find the sum of the geometric series 2 + 
+ 
+ . . . + 
.
A. 2.022222 B. 0.222222 C. 2.202022 D. 2.222222