Answer:
a) 
b) 
Step-by-step explanation:
Polar coordinates are represented as:
, where 'r' is the length (or magnitude) of the line, and '
' is the angle measured from the positive x-axis.
in our case:

to covert the polar to cartesian:


we can plug in our values:


the Cartesian coordinates are:


(b) to convert (x,y) = (6.06,-3.5)
we'll use the pythagoras theorem to find 'r'



the angle can be found by:




to convert radians to degrees:

writing in polar coordinates:

Answer:
Its better to buy this week because it is cheaper with using coupon.
Step-by-step explanation:
140 x 0.85 = 119
125 > 119
Answer:
22.77%
Step-by-step explanation:
4351-3360 / 4351 x 100 = 22.77%
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