A researcher is gathering data to design a wearable device that measures heart rate from the wrist. He/She took wrist measuremen
ts from 10 people to determine what the average wrist size should be for said wearable device. The mean and standard deviation of 10 wrist measurements were calculated to be: Mean, (inches) i = 7.838 Standard | Deviation, Sx Sx = 0.844 Number of samples (n) 10 Determine a 99% confidence interval for the mean presented above. (Use the appropriate table)
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Answer:
The area of the rectangle on the left side is
The area of the bottom rectangle is
The total area of the composite figure will be
Step-by-step explanation:
The area of any given rectangle can be found by multiplying the length of that rectangle by its width. The rectangle on the left side has a length of 9cm but the width is unknown. To find the width, we subtract 6cm from the width of the bottom rectangle: 10cm. And that gives us 4cm.
Therefore, we can now calculate the area to be: length × width = 9cm × 4cm = 36cm²//
The area of the bottom rectangle can be found similarly by multiplying the length: 2cm by the width: 6cm of that rectangle. And the result gives us: 2cm × 6cm = 12cm²//
The total area of the composite figure is calculated by adding the results from the left and bottom rectangles together. And that gives us: 36cm² + 12cm² = 48cm²//