Solve the problem.The percentage of households that mailed back Census forms for various years are listed in the table below. The Census occurs every ten years. 
?Let f(t) represent the percent of households that mailed back Census forms at t years since 1980.i) Find an equation for f following a square root model. Round to the nearest integer.ii) Use your model to predict the percent of households that will mail back Census forms in 2020.iii) Use your model to predict when half of households will mail back Census forms.
What will be an ideal response?
| i) | f(t) = -3 + 78 |
iii) 2067
Mathematics
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Evaluate the iterated integral.
A. - 
B. 
C. 
D. - 
Mathematics
Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.14, 8 , 2, -4, . . .
A. an = 6n - 20; a20 = 100 B. an = -6n + 14; a20 = -106 C. an = 6n - 14; a20 = 106 D. an = -6n + 20; a20 = -100
Mathematics
Multiply and simplify.(
- 3)(
- 4)
A. x
+ 12
B. x
+ 12
C. x
- 4
- 3
+ 12
D. x
+ 
+ 12
Mathematics
Solve the problem.Let f(x) be the function represented by the dashed line and g(x) be the function represented by the solid line. Solve the equation f(x) ? g(x).
A. x ? 3 B. x < -2 C. x ? 3 D. x ? -2
Mathematics