A radioactive substance decays in such a way that the amount of mass remaining after t days is given by the function m(t) =  figure 1.png)
where m t( ) is measured in kilograms. Round your answers to three decimal places. Find the mass at time t = 0 .
(a) 13.5kg
(b) 0.015kg
(c) 13.015kg
(d) 15.135kg
(e) none of these
(e) none of these
Mathematics
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Use power regression to model the following data. Use two digits of accuracy for the coefficient and for the power. x 1 3 4 7 8 y 4.46 14.74 21.68 44.5 54.31?
A. 
B. ?
C. ?
D. ?
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Find an equation for the graph.
A. y = 5 cos 
B. y = 2 cos 
C. y = 2 cos (5x)
D. y = 5 cos (2x)
Mathematics
Find all values of x satisfying the given conditions.y = (x + 12)3/2 and y = 343
A. {-5}
B. {61}
C. 
D. {37}
Mathematics
Provide an appropriate response.The feasible region of a set of two inequalities must always be unbounded. True or false?
A. True B. False
Mathematics