If the population of loins in the east any hills was 3,000 in 1957. if the population decreased 10% each year. what is the current population?

I’m stuck on this i don’t understand.

Brent needs to paint a logo made using two right triangles. the dimensions of the logo are shown below. what is the difference between the area of the large triangle and the area of the small triangle? (1 point) select one: a. 4.5 cm2 b. 8.5 cm2 c. 16.5 cm2 d. 33.0 cm2

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much