Halo blight is a highly contagious fungus that can spread in some farm crops Five hours after the blight was found 0 46 acres of the field is infected 12 hours later so a total of 17 hours after the blight was found the number of acres infected has grown to 30 7 acres Find the rate at which the blight spreads as a decimal rounded to two decimal places A r Find the number of acres infected when the blight is first identified A Acres The field Is a total of 160 acres Estimate the time for the field to be entirely infected round to the nearest hour