A formula is given, along with values for all but one of the variables in the formula. Find the value of the variable that is not given.P = 2L + 2W for L = 9, W = 4
A. P = 26
B. P = 72
C. L = 26
D. P = 13
Answer: A
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Find the indicated roots. Write the answer in a + bi form.Fourth roots of -16
A. 2 + i, 2 - i, -2 + i, -2 - i
B. 1 + i, 1 - i, -1 + i, -1 - i
C. 8
+ 8
i, 8
- 8
i, -8
+ 8
i, -8
- 8
i
D. 
+ 
i, 
- 
i, - 
+ 
i, - 
- 
i
Solve the problem.Find k if x = 
is a solution of the equation kx2 + x + 8 = 0.
A. k = 
B. k = 
C. k = 
D. k = 
Give the values of Xmin, Xmax, Ymin, and Ymax for the screen, given the values for Xscl and Yscl.
Xscl = .3, Yscl = .5
A. [-1.5, 1.5] by [-2, 2] B. [-4, 4] by [-5, 5] C. [-5, 5] by [-4, 4] D. [-15, 15] by [-20, 20]
A railroad track has an angle of elevation of 7.0 o. What is the difference in height (in feet) of two points on the track 1.00 mi apart? Round your answer to the appropriate number of significant digits.
A. 651 ft B. 665 ft C. 664 ft D. 648 ft E. 669 ft