Choose the missing exponent to create a polynomial: 3x^4+4x^2-9x^-? +2
a)2
b)3
c)-9
d)7
e)4

Any given polynomial must have all positive exponents over the placeholder
we see we are given 9x^-?
so (-) times what=positive?
the answer is negative
so we must pick a negative exponent

so the answer is C -9

It is 5.8 you add all of the up to equat 180 then solve the equation