0.25 is 1/4 if that's what youre asking, i'm not sure,
233 1/3
you start with .3x = 70, as this is the sentence given, solving for x.
divide both sides by .3, and you get x

x=8
16-8=8

Use a calculator to find the square root of 8.
The appropriate choice is
Polynomial B. -3x⁴ +5x³ +5
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C and D are not trinomials. (They have 4 terms, not 3.) A is 5th degree, not 4th.