Around 4 months of age, your Lab puppy will begin replacing the milk teeth with adult teeth. At 6 to 7 months, the full set of 42 permanent teeth will be in.
(plural strike rates) ( 1 baseball) the number of runs of a batter divided by the number of balls faced. ( 2 cricket) the number of runs scored by a batsman per 100 balls faced; the number of balls bowled by a bowler divided by the number of wickets taken.  Link/Cite.
A foreign exchange rate is the relative value between two currencies. In particular, the exchange rate is the quantity of one currency required to buy or sell one unit of the other currency.* Jump straight to today's exchange rate on Yahoo here or keep reading to understand what the exchange rate means to you. In travel, the exchange rate is defined by how much money, or the amount of a foreign currency, that you can buy with one US dollar. The exchange rate defines how many pesos, euros, or baht you can get for one US dollar (or what the equivalent of one dollar will buy in another country). Why Travelers Need to Know What the Exchange Rate Is