Write expanded notation.The projected population in 2030 for a certain country is 280,309.
A. 2 hundred thousands + 0 ten thousands+ 8 thousands + 3 hundreds + 0 tens + 9 ones
B. 2 hundred thousands + 8 ten thousands + 3 thousands + 0 hundreds + 0 tens + 9 ones
C. 2 hundred thousands + 8 ten thousands + 0 thousands + 3 hundreds + 0 tens + 9 ones
D. 28 ten thousands + 0 thousands + 3 hundreds + 0 tens + 9 ones
Answer: C
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Obtain the Cartesian equation of the curve by eliminating the parameter.x = 9 sin2 t, y = 9 cos2 t; 0 ? t ? 2?
A. 
+ 
= 1
B. x + y = 9
C. x2 + y2 = 9
D. 9x + 9y = 1
Match the equation with the surface it defines.
+ 
= 
A. Figure 2 B. Figure 1 C. Figure 4 D. Figure 3
Provide an appropriate response. A measurement is 12.3 sec. Find the greatest possible error of this measurement:
A. 1 sec B. .05 sec C. 0.005 sec D. 0.5 sec
Answer the question(s) based on the following situation: Over the last 80 years records have been kept of the annual rainfall in the Tasmanian desert. The distribution of annual rainfall is approximately normal and has no outliers. The minimum of 4.5 inches of rain occurred in 1952; the maximum of 11.7 inches of rain occurred in 1934.In this part of the world, anything over 10.5 inches of annual rainfall is considered a "wet" year. Of the last 80 years, approximately how many were "wet" ones?
A. 4 B. 16 C. 6 D. 2 E. none of these