Find the function value.Find cos 
, given that cos ? = - 
and 180° < ? < 270°.
A. - 
B. - 
C. 
D. 
Answer: B
Mathematics
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Round off the approximate number as indicated.2659 2 significant digits
A. 2600 B. 2660 C. 2700 D. 2800
Mathematics
Find any values of the variables that must be excluded.
A. z = 0 B. z = 6 C. z = -6 D. Defined for all real numbers
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
A. - 
B. 
C. 
D. - 
Mathematics
Solve the problem.If an object is dropped off of a tower, the velocity, V, of the object after t seconds can be obtained by multiplying t by 32 and adding 10 to the result. Express V as a linear function of t.
A. V(t) = 
B. V(t) = 42t
C. V(t) = 32 + 10t
D. V(t) = 32t + 10
Mathematics