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 11 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. 77.6%
B. 68.1%
C. 64.1%
D. 70.3%
Answer: B
Mathematics
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Solve the problem.The area of a square is 81 square centimeters. If the same amount is added to one dimension and removed from the other, the resulting rectangle has an area 9 square centimeters less than the area of the square. How much is added and subtracted?
A. 12 cm B. 9 cm C. 3 cm D. 4 cm
Mathematics
Find the domain and the range for the function.
A. Domain: (
, ?), Range: (-?, 0]
B. Domain: (-?, 5], Range: [0, ?)
C. Domain: (-?, 5) ? (5, ?), Range: (-?, 0) ? (0, ?)
D. Domain: (-?, ?), Range: [0, ?)
Mathematics
Find the slope of the specified line.x = -4
A. 4 B. -4 C. undefined D. 0
Mathematics
Divide.
A. x - 25 B. x - 5 C. x + 25 D. x2 - 5
Mathematics