"all integers are rational numbers" true or false

What is the solution to the equation 9^(x+1) =27

The inside wheels of a car traveling on a circular path are rotating half as fast as the outside wheels. the front two wheels are six feet apart. what is the number of feet in the path traced by the inside front wheel in one trip around the circle? express your answer in the form "k \pi", where k is an integer.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base