If the cornerstone represents when a building was built and it reads MDCCLXXV, when was the building built?

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

Seattle, washington is known for being rainy. one day last month, 8 inches of rain fell in 1 1/2 hours. what us the rate of the rainfall expressed in ft per plzzz write a proportion i will give you 100 points

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle