A child has an enormous jar in which she has been saving all of her spare change. In order to determine exactly how much money she has in the jar, she dumps all of the coins on the floor and counts them. Under the watchful eye of her mother, she counts 180 pennies, 120 nickels, 100 dimes, and 80 quarters.The data collection method used in this example is called
A. a census.
B. a controlled study.
C. a survey.
D. random sampling.
E. none of these
Answer: A
Mathematics
You might also like to view...
Solve the problem.Suppose f(x) = 29.4 + 1.2log (x + 1) models salinity of ocean water to depths of 
at a certain latitude. x is the depth in meters and f(x) is in grams of salt per kilogram of seawater. Approximate the salinity (to the nearest hundredth) when the depth is 77 meters.
A. 54.43 g/kg B. -27.13 g/kg C. 31.67 g/kg D. 56.83 g/kg
Mathematics
Solve the equation.2-3x + 9 = 8
A. {-4} B. {-2} C. {4} D. {2}
Mathematics
Simplify the expression. Write the answer with only positive exponents. Assume that all variables represent nonzero real numbers.105(10-2)
A. 
B. 
C. 103
D. 104
Mathematics
Find the exact function value if it exists.sin (-630°)
A. 
B. 1
C. 0
D. Undefined
Mathematics