Solve the problem.The formula 
represents the number of households N, in thousands, in a certain city that have a computer x years after 2010. According to the formula, in what year would there be 217 thousand households with computers in this city?
A. 2021
B. 2020
C. 2018
D. 2019
Answer: D
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Without graphing the function, state the shift(s) that are applied to the graph of 
to graph the given function. If the graph of 
must be rotated about the x-axis, state this.f(x) = (x + 8)2
A. right 8 units B. up 8 units C. left 8 units D. down 8 units
Assuming that the equations define x and y implicitly as differentiable functions 
find the slope of the curve 
at the given value of t.x = t sin t + t, y cos t + y = 2t, t = 
A. 
B. 
C. 2 + ?
D. - 
Which of the following figures is mapped onto itself by a 90 deg rotation around the point of intersection of its diagonals?
(a) a rhombus. (b) a rectangle. (c) A parallelogram. (d) A pentagon. (e) None of these is correct.
Decide whether the statement is true or false.{3, 6, 9, 12} ? {3, 9} = {3, 6, 9, 12}
A. True B. False