What is the number that when you multiply by 2 and add 7 to the product you get is 10.8 pls answer

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

Identify the number 127 as a rational or irrational. explain

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.