A board 10 ft long leans against a vertical wall. If the lower end is being moved away from the wall at a rate of 0.3 ft/sec, how fast is the upper end coming down when the lower end is 8 ft from the wall?
What will be an ideal response?
?0.4 ft sec
Mathematics
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Evaluate the expression.
3
A. 
B. 3
C. 
D. 
Mathematics
Solve the equation for solutions in the interval [0°, 360°).cos2 
= 1
A. ? = 0°, 45°, 90°, 135°, 180°, 225°, 270° B. ? = 0° C. ? = 0°, 90°, 180°, 270° D. ? = 33°, 57°, 123°, 147°, 213°, 237°, 303°, 327°
Mathematics
Identify the vertex, axis of symmetry, and whether the parabola opens upward or downward.
A. (0, 2); x = 0; Upward B. (2, 0); x = 0; Downward C. (2, 0); x = 2; Upward D. (0, 2); x = 0; Downward
Mathematics
Solve the problem.Determine whether the ordered triple (7, 2, -5) is a solution of the system of equations.3x - 8y + z = 02x + 4y - 3z = 37-x + 2y - z = 2
A. Yes B. No
Mathematics