At the end of an experiment, group a had a residual of 32.075 grams of iron and group b had a residual of 19.5 grams of iron. using significant digits, find out how many more grams of iron group a had than group b.
a. 12.6
b. 12.50
c. 12.57
d. 12.575

How to solve a simultaneous equation involved with fractions?

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

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.