A radioactive isotope decays at the rate indicated by the exponential function A (t) =800 (1/2) ^ t/1500, where “t” is the time in years and A(t) is the amount of the isotope, in grams, remaining what is the initial mass of the isotope? A. 200 grams
B. 900 grams
C. 800 grams
D. 400 grams

Measures of the angle of r, 31 s (x+4) t (3x+9)

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)

Which of the binomials below is a factor of this exression? 16x^2+40xy+25y^2 a.4x-5y b. 2x-5y c.4x+5y d.2x+5y