Solve the problem.Find the moment of inertia about the origin of a thin plane of constant density 
bounded by the coordinate axes and the line 
.
A. 16
B. 256
C. 64
D. 384
Answer: B
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Subtract.(-2r4 + 9r3 - 3r) - (8r4 - 9r3 + 6r2 - 2r)
A. 6r4 + 6r2 - r B. -10r4 + 18r3 - 6r2 - r C. -6r4 - 6r2 + r D. 10r4 - 18r3 + 6r2 + r
Fill in the digits for the given place values in the following whole number.62,185ten thousands ones
A. Ten thousands 6, ones 5 B. Ten thousands 2, ones 5 C. Ten thousands 8, ones 1 D. Ten thousands 6, ones 2
Multiply and simplify.
? 
A. 
B. 
C. - 
D. - 
Solve the problem.The function y = 700e-0.0077x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 700 pounds of the material are initially put into the vault, how many pounds will be left after 170 years?
A. 189 pounds B. 661 pounds C. 485 pounds D. 185 pounds