11. The previous monthly balance on Barney Laurent's charge card is $144. 79. He made a payment of $144. 79 and had charges of $125. 22,

$23. 22, and $33. 65. There is no finance charge.

12. Amber Cho's monthly statement for her credit card shows a $529. 78

previous balance, her $85. 00 payment, a $7. 95 finance charge, and

credits of $49. 45 and $39. 22. This month's new purchases are $277. 32

and $38. 20.

13. Mario Azaria received the charge account statement partially shown

below. Find his (a) payments and credits, (b) new purchases, and

(c) new balance.

Witch represents the inverse of the function f(x)=1/4x-12

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

Amachine that produces a special type of transistor (a component of computers) has a 2% defective rate. the production is considered a random process where each transistor is independent of the others. (a) what is the probability that the 10th transistor produced is the first with a defect? (b) what is the probability that the machine produces no defective transistors in a batch of 100? (c) on average, how many transistors would you expect to be produced before the first with a defect? what is the standard deviation? (d) another machine that also produces transistors has a 5% defective rate where each transistor is produced independent of the others. on average how many transistors would you expect to be produced with this machine before the first with a defect? what is the standard deviation? (e) based on your answers to parts (c) and (d), how does increasing the probability of an event a↵ect the mean and standard deviation of the wait time until success?