When P dollars is invested at interest rate​ r, compounded​ annually, for t​ years, the investment grows to A​ dollars, where A. ​Trevor's parents deposit ​$ in a savings account when Trevor is 16 years old. The principal plus interest is to be used for a truck when Trevor is 18 years old. Find the interest rate r if the ​$ grows to ​$ in 2 years.

The smelting department of kiner company has the following production and cost data for november. production: beginning work in process 3,700 units that are 100% complete as to materials and 23% complete as to conversion costs; units transferred out 10,500 units; and ending work in process 8,100 units that are 100% complete as to materials and 41% complete as to conversion costs. compute the equivalent units of production for (a) materials and (b) conversion costs for the month of november.