There are 4 rectangles in the ArrayList shapes. ArrayLists start counting at 0 so when index is 3, dataRecord will be the 4th rectangle. The length and width of the 4th rectangle in shapes are both 4 so the area is 16 and the perimeter is 16. The answer is 3.
I'm pretty sure the correct answer is choice B.
I hope this helps you! :-)
Answer:
λpeak= x10^ m = nm = microns.
Explanation:
If frequency or some other variable is used on the horizontal axis, the peak will be at a different wavelength. If the temperature is = C = K, then on the traditional wavelength plot the wavelength at which the radiation curve peaks is: λpeak= x10^ m = nm = microns.