In the regression equation y = -1.2x + 102.45, x represents the number of cloudy school days and y represents the percent of school attendance on those days. predict the per cent of school attendance during a month with 18 cloudy days. a) 78.52% b) 80.85% c) 90.36% d) 93.47%

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)