Test the equation for symmetry with respect to the specified axis, line, or pole.r = -4 cos ?; the x-axis (polar axis)
A. May or may not be symmetric about the x-axis
B. Symmetric about the x-axis
Answer: B
Mathematics
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Graph the function.y = 5 cos (?x)
A. 
B. 
C. 
D. 
Mathematics
Provide an appropriate response.Suppose that the rent for an apartment in a city with rent control is $540 per month. Show that the rent function R(t) = 540 is continuous at t = 3.
What will be an ideal response?
Mathematics
Solve the equation.
+ 
= -1
A. 5
B. 0
C. No solution
D. - 
Mathematics
Solve the problem.A box contains a radioactive substance. The number of kilograms r(t) at time t years is given by the formula 
How long will it take until only one-half kilogram of the radioactive substance is left in the box?
A. 881.45 yr B. 4407.23 yr C. 220.36 yr D. 440.72 yr
Mathematics