120/5 = 24
so 20 + 22 +24 +26 +28 = 120
5th number = 28
No. The third expression x^-3 + 4x is not a polynomial because the exponent is -3. Polynomials can have exponents but only 0, 1, 2, 3, and the rest of the positive integers are allowed. They can have constants and variables that can be combined by the four basic operations except division by a variable like 1/x or like the third expression x^-3 + 4x which is also 1/x^3 + 4x. The other three given expressions are polynomials.
It is 94%. Add everything from 20-21 all the way onwards and divide by 200. Then multiply by 100.
5.05654165E45 is your answer
Out of 170 students in 12th grade, 27+23 = 50 students have more than 1 college in mind.
So 50/170, or 29% is your answer.