Write the standard form of the equation of the circle.Center (0, 0), r = 2
A. x2 + y2 = 4
B. x2 + y2 = 2
C. (x - 2)2 + (y - 2)2 = 2
D. (x - 2)2 + (y - 2)2 = 4
Answer: A
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Solve the problem.A certain radioactive isotope decays at a rate of 2% per 100 years. If t represents time in years and y represents the amount of the isotope left then the equation for the situation is 
In how many years will there be 85% of the isotope left?
A. 1,500 yr B. 813 yr C. 234 yr D. 750 yr
Solve the problem.John is going on vacation and plans to take between 4 and 7 shirts and 2 or 3 pairs of pants. Additionally, space in his luggage dictates that he take a total of between 7 and 8 shirts and pants. Graph the possible number of shirts and pants he will take. number of pants
number of shirts
A. number of pants
number of shirts
B. number of pants
number of shirts
C. number of pants
number of shirts
D. number of pants
number of shirts
Find Q when XL = 47 Kê and R = 33 Kê.
a. 5.4 b. 1.3 c. 2.8 d. 0.7 e. 8.0
Divide using synthetic division.(8x3 - 4x2 - 2x - 1) ÷ 
A. 8x2 - 8x + 2 - 
B. 8x2 - 7x + 2 + 
C. 8x2 - 8x + 3 - 
D. 8x2 - 8x + 2 + 