What time does us understand our world by

An object weighs 40n in air , weighs 20n when submerged jn water and 30n submerged in a liquid of unknown density .what is the density of the liquid?

No creative answers only the right onesanswer asapif you learned oratory, what could you do? a. give good speeches b. understand the law c. make fun of peopled. race chariots

Banks offer services such as checking and savings accounts. what do banks do with most of the money they receive in deposits from customers? a) they loan it out to other customers. b) they spend it on new banks in other places. c) they keep it in a locked, secured vault in the bank. d) they send it to the federal reserve in washington, d.c.