In a history class, the girl to boy ratio is 5 to 3. If there are 80 students total, how many boys are there?

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?

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Will mark name all segments skew to bc