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 lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have