急急急!!!!數學

1) 9 tons of granite were removed from the quarry on tuesday, 13 tons on wed and thurs an amount equal to the average removed on the two previous days were removed. what was the average amount of granite removed per day over the three-day period?Round your ans to the nearest tenth if needed.

*比埋Steps唔該*

更新1:

2) Professor Blurp of the local museum tested some unidentified mineral specimens that had recently been donated by a mineral club.............

更新2:

2) Depending on which part of the mineral he tested he found 59.28%, 59.5% or 59.46% barium in the specimens. What was the average barium in the specimen?Round you ans to the nearest hundredth of a percent.

回答 (1)