Solve the problem.A certain radioactive isotope decays at a rate of 0.275% annually. Determine the half-life of this isotope, to the nearest year.
A. 109 years
B. 252 years
C. 182 years
D. 3 years
Answer: B
Mathematics
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Write the digit for the given place value in the whole number.2,163,688hundred thousandstens
A. hundred thousands 1 tens 8 B. hundred thousands 2 tens 8 C. hundred thousands 1 tens 3 D. hundred thousands 6 tens 6
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Use the properties of equality to solve the equation.y + 
= -8
A. 
B. - 
C. - 
D. -46
Mathematics
Use a calculator to give the value in degrees.sin-1(0.8830)
A. 62° B. 118° C. 57° D. 60°
Mathematics
Find the derivative.y = 5x2
A. 2x ln 5 B. 5x2 2x ln x C. 5x2 x ln 5 D. 5x2 2x ln 5
Mathematics