Today we studied two things: simple interest and finding the original amount.
Simple interest is calculated using the formula I = PxRxT/100.
Where I is the interest, P is the principal (the amount you invest), R is the rate of interest and T is the time the money is invested for measured in years.
Finding the original amount is the opposite of what we have studied so far. To find 20% of 70 we did 0.2 x 70 = 14. The opposite of times is divide. So if 20% of something is 14 we find that something by calculating 14/0.2 = 70.
Homework: 4.10 and 4.11
Some people still need to show me last weeks homework (4.07 and 4.08) or the week before (3.13-4.06). Get this is quick please!
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