Determine if the given set of whole numbers is closed under addition.{0, 1}
A. Not closed
B. Closed
Answer: A
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Find the slope-intercept form of the equation of the line with the given properties.Slope = 4; containing the point (-2, -3)
A. y = -4x - 5 B. y = 4x - 5 C. y = -4x + 5 D. y = 4x + 5
Simplify by factoring. Assume that any variable in a radicand represents a positive real number.
A. y22
B. y3
C. y10
D. y22
Solve the problem.An area is to be fenced as shown in the figure. Only 200 feet of fencing is available. The fenced-in area is 
or A = x(100 - x) = -x2 + 100x.
i)Graph A = -x2 + 100x (using your graphing calculator)ii) Using the graph, estimate the value of x that will yield the maximum area.iii) Find the maximum area.
A.
| ii) | x = 48 ft |
B.
| ii) | x = 100 ft |
C.
| ii) | x = 25 ft |
D.
| ii) | x = 50 ft |
Solve the problem.A toy rocket is shot vertically upward from the ground. Its distance in feet from the ground in t seconds is given by 
. At what time(s) will the ball be 
from the ground?
A. 167.8 and 178.2 sec B. 0.8 and 10.0 sec C. 10.8 sec D. 5.4 sec