James likes to collect coins. jason got 31 coins from his brother 26 coins from his mother, as well as 29 coins from mike. however jason lost 20 coins before putting these coins into his piggybank. how many coins does jason have in his piggybank

(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer