Factor the polynomial over th complex numbers.
f(x)=4x^4+32x^3-35x^2+8x-9

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

Write the summation to estimate the area under the curve y = 1 + x2 from x = -1 to x = 2 using 3 rectangles and right endpoints

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b