Product and Quotient of Powers

  $$7^9$$  

  $$49^8$$  

$$7^8$$  

None of the above

  $$18x^7$$  

  $$-18x^7$$  

$$3x^7$$  

None of the above

  $$c^{45}$$  

  $$3c^{11}$$  

  $$c^{11}$$  

None of the above

  $$70u^3v^{15}$$  

  $$17u^3v^8$$  

  $$70u^3v^8$$  

None of the above

$$x^2y^{-4}$$  

$$\frac{y^4}{x^2}$$  

$$\frac{x^4}{y^2}$$  

$$x^2y^4$$  

$$\frac{9}{x^2y^7}$$  

$$\frac{1}{x^2y^7}$$  

$$x^2y^7$$  

$$9x^2y^7$$