Choose the more precise measurement. 82.1mm; 48.3cm please hurry!!

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x