Carbon-11 has half-life of 20 minutes. if a 50 gram sample of carbon -11 begins to decay, write a model for the amount, a, that is still radioactive after m-minutes. then, use your model to determine how much of the original sample is still radioactive after a half- hour. round to the nearest tenth of a gram

The axis of symmetry for the graph of the function f(x)=1/4^2+bx +10 is x=6. what is the value of b?

Use the expression below.–4b + 8c + 12 – 8b – 2c + 6part asimplify the expression. enter your answers in the boxes. b + c + part bfactor the simplified expression using the gcf. a. 2(–2b + c + 3) b. 3(–2b + c + 3) c. 4(–2b + c + 3) d. 6(–2b + c + 3)part cwhat is the value of the expression when b = 2 and c = –3? enter your answer in the box.

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