Mr Mitchell has 12 hats Mr B has 2/3 the amount of the hats Mr Mitchell has. How many hats does Mr B have. Need answer in 2 seconds

Find x & pleassse me !

What are the domain and range of the function f(x)=2^x+1

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.