A support wire for a telephone pole is anchored to the ground at point 8 feet from the bottom of the pole, and it forms a 80° angle with the ground. Calculate the length of the support wire, rounded to the nearest whole foot. include steps

The product of two negative rational numbers is always zero sometimes zero never zero

The late fee for library books is $2.00 plus 15¢ each day for a book that is late. if maria’s fee for a late book was $3.20, write and solve a linear equation to find how many days late the book was.

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?