nces Problem 3-5 (Algo) A cosmetics manufacturer's marketing department has developed a linear trend equation that can be used to predict annual sales of its popular Hand & Foot Cream F = 70,000+15,000t Where Ft Annual sales tis in years (Enter all answers as whole numbers.) a. Are annual sales increasing or decreasing? By how much? Annual sales are by b. Predict annual sales for year 5 using the equation. Annual sales for year 5 bottles bottles per year.