Margaret wants to call her friend overseas. there is a connection fee of $2 and a charge of $1.60 per minute. so the cost of the call is 2 + 1.6t dollars for t minutes.

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

What is the perimeter of an equilateral triangle if each side is (x+3)?