Solve the problem.A study was conducted to compare the average time spent in the lab each week versus course grade for computer students. The results are recorded in the table below. Use the equation of the least squares line to predict the grade of a student who spends 20 hours in the lab. Number of hours spent in lab (x) Grade (percent) (y) 10 96 11 51 16 62 9 58 7 89 15 81 16 46 10 51
A. 47.4%
B. 55.4%
C. 51.4%
D. 68.6%
Answer: C
Mathematics
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Find the absolute value of the complex number.7
A. 
B. 49
C. 7
D. 7i
Mathematics
Approximate the coordinates of each turning point by graphing f(x) in the standard viewing rectangle. Round to the nearest hundredth, if necessary.f(x) = 
(x3 - 3x2 - 45x + 5)
A. (-5, 6.8) and (3, -3.44) B. (-5, 7.2) and (3, -3.04) C. (-3, 3.04) and (5, -7.2) D. (-3, 3.44) and (5, -6.8)
Mathematics
Solve.
- 
= 
A. 7
B. -4
C. 
D. 4
Mathematics
Provide an appropriate response.Let z1 = r1(cos ?1 + i sin ?1) and z2 = r2(cos ?2 + i sin ?2), r2 ? 0. Verify that z1/z2 = r1/r2[cos (?1 - ?2 ) + i sin (?1 - ?2)] .
What will be an ideal response?
Mathematics