Which of the following is NOT a numerosity estimation task?
a. Estimating the number of people in the National Mall attending a Presidential Inauguration
b. Estimating the product 45 X 67
c. Estimating the number of jelly beans in a jar
d. Estimating how many minutes per day are spent standing in line
Ans: b
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Find the distance between the pair of points. Where appropriate, give an approximation to three decimal places.(8, 1) and (8, -11)
A. 20 B. 12 C. 11 D. 13
Simplify the expression. Express the answer so that all exponents are positive. Whenever an exponent is 0 or negative, we assume that the base is not 0.(x-2y)5
A. 
B. x10y5
C. 
D. 
Factor any difference of two squares, or state that the polynomial is prime. Assume any variable exponents represent whole numbers.x2y2 - 81
A. (xy + 9)(xy - 9) B. prime C. (xy - 9)2 D. (x + 9y)(x - 9y)
Express as a sum of logarithms.ln 0.9b
A. ln 9 - ln b B. ln 0.9 + ln b C. ln(0.9 + b) D. ln 0.9 - ln b