Nancy Bondy's aunt has promised to deposit $1 to her account on the first day of her birthday month, $2 on the second day, $3 on the third day, and so on for 30 days. How much will this amount cover the entire month?

Amanufacturer has paid an engineering firm $200,000 to design a new plant, and it will cost another $2 million to build the plant. in the meantime, however, the manufacturer has learned of a foreign company that offers to build an equivalent plant for $2,100,000. what should the manufacturer do?