If possible, evaluate the expression at the given value of the variable.
, x = -3
A. - 
B. - 3
C. 3
D. 
Answer: A
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Determine whether the graph is connected or disconnected.
A. Disconnected B. Connected
Find the average value of the function over the region.f(?, ?, ?) = ? cos ? over the solid lower ball ? ? 10, ?/2 ? ? ? ?
A. 
B. - 2500?
C. - 
D. 
Determine the domain and range of the function and graph it.f(x) = 
+ 3
A. domain: [3, ?), range: [0, ?)
B. domain: [-3, ?), range: [0, ?)
C. domain: [0, ?), range: [3, ?)
D. domain: [0, ?), range: [3, ?)
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