The mass of one oxygen molecule is 5.3x10-23 gram. find the mass of 20,000 molecules of oxygen. express the answer in scientific notation

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

43lbs of tomatos cost $387. how much would 41lbs cost

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!