It is an equation for intensity of sound in a room as a function of time after shutting off the source, involving the volume and exposed surface area of the room, the speed of sound, and the mean sound-absorption coefficient.
Question : The equation of the line if its slope is $-\frac{3}{7}$ and it passes through the point (5, 2) is:
Option 1: $3x+7y=29$
Option 2: $3x-7y=1$
Option 3: $3x+7y=1$
Option 4: $3x-7y=29$
Question : Directions: Which two numbers should be interchanged, to make the given equation correct? 96 ÷ 6 – 16 + 12 × 8 = 40
Option 1: 6 and 16
Option 2: 96 and 16
Option 3: 6 and 8
Option 4: 6 and 12
Question : Directions: What will come in the place of (?) in the following equation, if + and – are interchanged and × and ÷ are interchanged? 9 ÷ 576 × 24 + 109 – 7 = ?
Option 1: 114
Option 2: 214
Option 3: 318
Option 4: 218
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