Solve the problem.Encode the following message: We will returnBreak the message into groups of two letters and use the matrix M = 
A. 
, 
, 
, 
, 
, 
B. 
, 
, 
, 
, 
, 
, 
C. 
, 
, 
, 
, 
, 
, 
D. 
, 
, 
, 
, 
, 
, 
Answer: D
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The figure shows the percentage of the U.S. population, f(x), made up of teachersas a function of time, x, where x is the number of years after 1900. Use the graph to solve the problem. 
In which year did the percentage of teachers in the U.S. reach a minimum?
A. 2000 B. 1900 C. 1970 D. 1990
Solve the problem.Find the slope of the line tangent to the curve 
at the point where 
Round to the nearest hundredth.
A. -8.17 B. 2061.01 C. -6.02 D. -2.01
Solve.The equation that represents the proper traffic control and emergency vehicle response availability in a small city is 
where P is the number of police cars on active duty and F is the number of fire trucks that have left the firehouse in response to a call. In order to comply with staffing limitations, the equation 
is appropriate. The number of police cars on active duty and the number of fire trucks that have left the firehouse in response to a call cannot be negative, so 
style="vertical-align: -4.0px;" /> and 
Graph the regions satisfying all the availability and staffing requirements, using the horizontal axis for P and the vertical axis for F. If 5 police cars are on active duty and 5 fire trucks have left the firehouse in response to a call, are all of the requirements satisfied?
A. Yes
B. No
C. No
D. Yes
Factor the polynomial by grouping.24x2 + 30x - 20x - 25
A. (24x - 5)(x + 5) B. (24x + 5)(x - 5) C. (6x + 5)(4x - 5) D. (6x - 5)(4x + 5)