Find the radius of convergence of the series. Select the correct answer.
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d. [-16,-4)
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Find the relative extrema, if any, of the function. Use the second derivative test, if applicable.
?
?
A. Relative minimum: 
B. Relative maximum: 
C. Relative minimum: 
D. Relative maximum: 
E. none
The power, in watts, dissipated as heat in a resistor varies directly with the square of the voltage and inversely with the resistance. If 70 volts are placed across a 70-ohm resistor, it will dissipate 70 watts. What voltage across a 10-ohm resistor will dissipate 250 watts? ?
A. 
B. ?
C. ?
D. ?
E. ?
Use the product and quotient rules, as necessary, to simplify the radical expression.
A. 0
B. 
C. 
D. 
Solve the problem.Ron finds 8 books at a bookstore that he would like to buy, but he can afford only 5 of them. In how many ways can he select 5 of the books to buy? How many ways can he make his selection if he decides that one of the books is a must?
A. 3360; 420 B. 6720; 840 C. 336; 210 D. 56; 35