Which type of graph would be best to use to show the change in the barometric pressure recorded every 2 hours over a 24-hour period?
a) dot plot
b) line graph
c) circle graph
d) box-and-whisker plot

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

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?

Math it's appreciated. (picture provided)