The half-life of an isotope is 20 years. A sample initially contains 100 grams of the isotope. The function that predicts the amount of isotope present in the sample ( A ) as a function of time in years ( t ) is A = 100 ( 2 − t 20 ) . Which graph below represents this function?

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates

How many square centimeters of wrapping paper will be used to wrap the shoe box?

Find a parametrization for the curve「and determine the work done on a particle moving along γ in r3 through the force field f: r^3--r^3'where f(x, y,z) = (1,-x, z) and (a) im (γ) is the line segment from (0,0,0) to (1,2,1) (b) im (γ) is the polygonal curve with successive vertices (1,0,0), (0,1,1), and (2,2,2) (c) im (γ) is the unit circle in the plane z = 1 with center (0,0,1) beginning and ending at (1,0,1), and starting towards (0,1,1)