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a) Sub y= π/2 into equation, hence x coordinate is 4π^2 b) to find equation of the tangent, differentiate the equation using the chain rule (wrt y) and then substitute the coordinates of p into the differ...
The island is 2km. If the scale is 1cm:500m we need to multiply both left and right sides by 4 to get to the 4cm that was measured. This gets us 4cm: 2000m . We now need to convert 2000m to km which gives...
To find out how much Charlie spends in total, you have to figure out how much he spends on each type of thing, and then add them together. To find how much he spends on each kind of thing, you have to mul...
1st multiply out the brackets:
y = 4x + 8 / 5x - 1
Next multiply both sides by the denominator onf the RHS:
y(5x-1) = 4x + 8
Again, multiply out the brackets:
5xy - y =...
2/5 = 8/20 3/4 = 15/20
8/20 + 15/20 = 23/20
23/20 = 1 and 3/20
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