Solve the quadratic equation using the most efficient technique (factoring, extracting square roots, completing the square, or the quadratic formula).
x2 + 
x + 
= 0
A. 
B. 
C. 
D. 
Answer: A
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?Find the volume of the following sphere: r = 6.5 cm. Use ? = 3.14 and round answer to nearest hundredth.
A. ?1,766.25 cm B. ?1,766.25 cm2 C. ?1,766.25 cm3 D. ?1,324.69 cm3 E. ?1,324.69 cm2
Find the function represented by the power series. 
A. - 
B. 
C. - 
D. 
Answer the question based on the following situation:An honest coin is tossed 1600 times. The random variable X denotes the total number of heads that come up in the 1600 tosses.What are the chances that X is more than 813?
A. approximately 84% B. approximately 75% C. approximately 16% D. approximately 25% E. none of these
Substitute to find the value of the expression.In one store, bananas cost 60 cents per pound. The cost, in dollars, of x pounds of bananas is 0.6x. What is the cost of 1.8 pounds of bananas?
A. $1.28 B. $3.00 C. $0.30 D. $1.08