(a) Bilangan pekerja di Syarikat PP ialah 12 ribu orang. Akibat kegawatan ekonomi, syarikat tersebut mengurangkan bilangan pekerja sebanyak 2% daripada jumlah pekerja pada
enam bulan pertama dan 5% lagi pada enam bulan berikutnya. Cari bilangan pekerja
terkini.
The number of staff of Syarikat PP is 12 thousand. Due to an economic downturn, the company
reduces the number of staff by 2% of the total number of staff during the first six months and
another 5% in the following six months. Find the latest number of staff.
[3 markah/marks)
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The graph of which of the following will be parallel to the graph of 4x – 3y = –12? a.y= 4/3x -3/2 b.6x-4y=-8 c. y=3/4x+1 d.4x- 2y=-12

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude