The graph of the derivative 
(x) of a continuous function f is shown. On what intervals is f decreasing?
(2, 6) ? (8, 9)
Mathematics
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Solve the problem.A searchlight is shaped like a paraboloid of revolution. If the light source is located 3 feet from the base along the axis of symmetry and the opening is 10 feet across, how deep should the searchlight be?
A. 6.3 feet B. 0.5 feet C. 8.3 feet D. 2.1 feet
Mathematics
Give all possible rational zeros for the polynomial.f(x) = 2x3 - 5x2 + 7x - 11
A. ±1, ±11, ± 
, ± 
B. ±1, ±2, ±11, ± 
C. ±1, ± 
, ±2, ± 
D. ±1, ±2, ±11
Mathematics
Write the expression in the standard form a + bi.
A. 
- 
i
B. 
- 
i
C. 
+ 
i
D. 
- 
i
Mathematics
Without using a calculator, give the exact trigonometric function value with rational denominator.tan 
A. 1
B. 
C. 
D. 
Mathematics