1. Consider the two functions y₁ = x² 3 and y₂ =b on the interval

[-a, a], if a = 8.7. What value does b have to be in order for the area between y₁ and y₂ and

[-a, a], to equal 44.6? Round your answer to five decimal places.

2. Consider the two functions x₁ = y² and x₂ =b on the y-interval

[-a, a], if a = 5.7. What value does b have to be in order for the area between x₁ and x₂ and [-a, a], to equal 63.6? Round your answer to five decimal places.

3. A palindrome is a word, such as "radar" reads the same forward and backward. How many different 11-letter palindromes are possible if they do not need to be real words and there are only 6 letters in the alphabet?

4. If ()=() , then what is the value of

ab(())()