Solve the equation for ? if 
. Do not use a calculator.
?
?
A. 120°; 240°
B. 150°; 330°
C. 60°; 240°
D. 45°; 225°
E. 30°; 120°
Answer: E
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Two cities in the western hemisphere lie approximately on the same meridian. City A has latitude of 15.5° N and City B, 60.5° N. Find the distance between these two cities. (The radius of the earth is 3960 miles.)
(a) 3,960 miles (b) 3,110 miles (c) 3,250 miles (d) 2,110 miles (e) 5,280 miles
Integrate the given expression.
dx
A. 
(x4 - 2x3)6 + C
B. (x4 - 2x3)6 + C
C. 
(x4 - 2x3)5 + C
D. 4x3 - 6x2 + C
Solve the problem.Which of the following [A), B), C), or D)] can be a negative number?
A. the variance of a data set B. the range of a data set C. the standard deviation of a data set D. the interquartile range of a data set E. none of these can be negative numbers.
Factor by grouping.x2 + dx + 2d + 2x
A. x(x + d) B. x(x + d) + 2 C. (x + 2)(x + d) D. x(x + 2)