Apicture frame is made with 40 inches of material. which expression can be used to calculate the area of the frame if the length of the frame is l?

a. a = i(20 - i)

b. a = i(i - 20)

c. a = i(40 - i)

d. a = i(i - 40)

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.