Help please A sodium isotope has a half-life of 15 hours, and 500 grams are initially present. How many hours will it take the
isotope to decay to 25 grams? Write and solve an exponential equation to find the answer. Round to the nearest tenth.

Convert 2000 swiss francs to dutch guilders

Axel follows these steps to divide 40 by 9: start with 40. 1. divide by 9 and write down the remainder. 2. write a zero after the remainder. 3. repeat steps 1 and 2 until you have a remainder of zero. examine his work, and then complete the statements below.

The price of a dozen eggs was $1.63. suppose the price increases m dollars per dozen and then the price decreases $0.12 per dozen. which expression represents the current price of eggs after the two price changes?