Answer: 1. 9^11; 2. 20^7
Step-by-step explanation: Since 9^10 is 10 9s multiplied by each other, multiplying it by another 9 will make the expression 11 9s multiplied by each other, or 9^11. For the second expression PEMDAS states simplify expression in parantheses first, which is 2x10=20, then raise it to exponent, which is 7, so 20^7 is the answer.