The width of the confidence interval is twice the margin of error. The lower bound of the confidence interval is the observed score minus the margin of error;
98% Grade was achieved, so 0.98 of the questions were answered correctly.
n = number of problems

Our final answer can't be a decimal, so we round it to:
Answer:
x(x+5)^2
Step-by-step explanation:
x^3+ 10x^2+25x
factor out an x
x(x^2+10x+25)
what numbers multiply to 25 and add to 10
x(x+5) (x+5)
x(x+5)^2
Just condone it and multiply it with the algorithm.