Let r = {a}, s = {x, y} and t = {p, q, r}. find each of the following sets. a. rx(s xt) b. (rx sxt c. rxsxt 5.

Remember that the Cartesian product over n sets X1, ..., Xn is the set

a) First we calculate ,

Now, we calculate ,

b) We calculate

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98

step-by-step explanation:

there are 36 inches in a yard

25 : 36 = 0.69 yards (you can round to 0.70)