Determine if the argument is valid or invalid. Give a reason to justify answer.If the bell rings, then we answer the door.The bell rings. ? We answer the door.
A. Valid by disjunctive syllogism
B. Invalid by fallacy of the converse
C. Invalid by fallacy of the inverse
D. Valid by the law of detachment
Answer: D
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Find the volume of the cylinder satisfying the given condition. Approximate values to the nearest tenth.radius = 6 cm, height = 8 cm
A. 263.8 cm3 B. 904.3 cm3 C. 527.6 cm3 D. 376.8 cm3
Let f be a linear function. Use the table to find the slope and y-intercept of the graph of f.
A. Slope 1, y-intercept -4
B. Slope - 
, y-intercept -4
C. Slope -4, y-intercept - 
D. Slope -1, y-intercept 4
Find the exact value of the real number y.y = arccos 
A. 
B. 
C. - 
D. 
Find the future value of the ordinary annuity. Interest is compounded annually, unless otherwise indicated.R = $100, i = 0.1, n = 7
A. $1948.72 B. $177.16 C. $771.56 D. $948.72