Which of the following best describes the thinking exhibited by mathematicians as they are engaged in doing geometry?
a. Idiosyncratic thinking
b. Procedural thinking
c. Van Hiele thinking
d. Normative thinking
Ans: d
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Perform the indicated operation. Write the answer in simplest form.40 ÷ 1
A. 28
B. 29
C. 31
D. 30
Simplify.-
A. 0.05 B. -0.5 C. does not exist as a real number D. -0.05
Solve the problem.In electronics, the relationship between the resistances R1 and R2 of two resistors wired in parallel and their combined resistance R is described by the formula 
= 
+ 
. If the combined resistance of two resistors wired in parallel is 2 ohms and one of the two resistances is 4 ohms, what is the other resistance?
A. 2 ohms
B. 4 ohms
C. 
ohms
D. 1 ohms
Solve the problem.The accompanying tables represent a function f that converts seconds to hours and a function g that converts hours to days.
Express (f -1?g -1)(x) symbolically.
A. (f -1?g -1)(x) = 86,400x2
B. (f -1?g -1)(x) = 
C. (f -1?g -1)(x) = 
D. (f -1?g -1)(x) = 86,400x