Which of the following is written in correct scientific notation?

a. 809 * 104

b. 80.9 * 104

c. 80.9 * 10-4

d. 8.09 * 104

first, correct answer gets brainiest

The number 72 lies between what perfect squares

Asoftball team played ten games, scoring 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 runs. they lost by one run in exactly five games. in each of their other games, they scored twice as many runs as their opponent. how many total runs did their opponents score?

If a and b represent positive real numbers what is the inequality when solves for v