Answer:
1).Sugar used in 7 days = 61.25 pounds
2). Total cost of 9 cupcakes = $38.25
Step-by-step explanation:
1). Alani uses 8.75 pounds of sugar each day.
 So, sugar used in 7 days = Amount of sugar used in one day × Number of   days
= 8.75 × 7
= 61.25 pounds
2). Since, each cupcake costs $4.25
  Number of cakes ordered = 9
 Total cost of 9 cupcakes = Cost of each cupcake × Number of cupcakes
                       =  4.25 × 9
                       = $38.25