Solve the problem.A certain radioactive isotope decays at a rate of 0.15% annually. Determine the half-life of this isotope, to the nearest year.
A. 333 yr
B. 201 yr
C. 5 yr
D. 462 yr
Answer: D
Mathematics
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Evaluate the exponential form.90
A. 1 B. -1 C. 9 D. 0
Mathematics
Add. Simplify the result whenever possible.
+ 
A. 
B. 
C. 
D. 
Mathematics
Compare the graph of f(x) with the graph of y = x2.f(x) = -5x2
A. Reflected across the x-axis and wider B. Reflected across the y-axis and wider C. Reflected across the y-axis and narrower D. Reflected across the x-axis and narrower
Mathematics
Find a slope-intercept form equation for the line.Through (4, 5), with slope - 
A. y = - 
x + 
B. y = 
x + 
C. y = 
x - 
D. y = - 
x + 
Mathematics