exam Maths Puzzle Numerical Ability

Please help suppose that N=cuberoot(x)+4 models the # of cases of an infection, in millions of a disease x years from now. How many cases of the infection will there be in 16 yrs f

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hello,

how would i factor out the gratest common factor in this expression:

x ^3 - 5x

thank you! Please help me with this problem:
A company had 120,000 shares of common stock outstanding on January 1 and then sold 40,000 additional shares on March 30. Net income for the year