From 1956 to 1966 the number of automobiles in the country increased at an annual rate of 6.65 percent. what is the doubling time for growth in automobiles in the us?

In the diagram, gef and hef are congruent. what is the value of x

The coordinate grid shows a pentagon. the pentagon is translated 3 units to the right and 5 units up to create a new pentagon. what is the rule for the location of the new pentagon?

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?