How long does it take an investment to double at an annual interest rate of 7.5% compounded continuously?

Aclothing corporation argues that it needs a tariff so workers are not laid off. this is an argument for an infant industry*** job protection national security environmental standards protection from dumping the real value of the u.s. dollar is determined by the u.s. government value of goods and services it buys*** u.s. investors in the foreign market foreign investors in the foreign exchange market supply and demand in the open market