David's heart beats 75 beats per minute. If this is his average heart rate, how many times will his heart beat in 45 years?
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That diagram can be split into a right angled triangle of base 7 and of height 4 + 5.2 + 2 = 11.2, and a square of length of 5.2 So the are of the total shape is the area of the right angled triangle + the area of the square.
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