Simplify each product. write in standard form. explain

16.
5k(3 - 4k)

18.
6g^2 (g - 8)

20.
-2n^2 (5n - 9 + 4n^2)

What is the solution to the division problem below x3+x2-11x+4/x+4

The average length of a king cobra is 3.7 m. the record length is 1.88 m longer than the average. how long is the record holder?

What 620000 divided by 10 to the third power