Find all the roots of the complex number. Put answers in standard form.Square roots of -1 + 
j
A. 
- 
j, - 
+ 
j
B. 6 - 2j, -6 - 2j
C. 
+ 
j, - 
- 
j
D. 
+ 
j, - 
- 
j
Answer: D
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Solve each proportion for the given variable.
= 
A. 4
B. 
C. 2
D. 578
A certain model of automobile has its gas mileage (in miles per gallon, or mpg) normally distributed, with a mean of 18 mpg and a standard deviation of 2 mpg. Find the probability that a car selected at random has gas mileage less than 17 mpg. Round your answer to four decimal places.
a. 0.3085 b. 0.8085 c. 0.1915 d. 0.6915 e. 0.383
Write the sum in summation notation.1 + 3 + 5 + 7 + . . . + 91
A. 
B. 
C. 
D. 
Solve the problem.The diagonal d (from the lower back corner to the upper front corner) of a rectangular solid, like the one shown below, is given by d = 
A rectangular shipping crate has a diagonal of 39 inches. If the longest side of the crate is 4.0 times the shortest side, and the other side is 3.0 in. longer than the shortest side, find all measurements of the crate, to the nearest inch. 
x x + 3.0 4x
A. 10 in., 13 in., 40 in. B. 15 in., 16 in., 60 in. C. 15 in., 36 in., 39 in. D. 9 in., 12 in., 36 in.