A farmer has a field in the shape of a semicircle of diameter 50 m. The farmer asks Jim to build a fence around the edge of the field. Jim tells him how much it will cost. Total cost = £29.86 per metre of fence plus £180 for each day's work Jim takes three days to build the fence. Work out the total cost. Show your working out.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

Consider a bag that contains 220 coins of which 6 are rare indian pennies. for the given pair of events a and b, complete parts (a) and (b) below. a: when one of the 220 coins is randomly selected, it is one of the 6 indian pennies. b: when another one of the 220 coins is randomly selected (with replacement), it is also one of the 6 indian pennies. a. determine whether events a and b are independent or dependent. b. find p(a and b), the probability that events a and b both occur.