Graph the function.f(x) = 2e-x
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem.A data-recording thermometer recorded the soil temperature in a field every 2 hours from noon to midnight, as shown in the following table. Use the Trapezoidal Rule to estimate the average temperature for the 12-hour period. Round your answer to the nearest hundredth if necessary.
A. 79.1°F B. 76.67°F C. 65.92°F D. 65.94°F
Determine the coordinates of the focus and the equation of the directrix of the parabola.x2 = -4y
A. F(0, 1), y = -1 B. F(0, -1), y = 1 C. F(0, -1), y = -1 D. F(-2, 0), x = 1
Rationalize the denominator and simplify. Assume that variables represent positive values.
A. 
(
+ 1)
B. 
(
+ 1)
C. 
(
- 1)
D. 
(
+ 1)
Solve the problem.If the area of the region at step 1 in the construction of the Koch snowflake is 27, then the area of the region at step 2 of the construction of the Koch snowflake is
A. 36. B. 2251/81. C. 30. D. 97/3. E. none of these