Which of these time measurements is the smallest? a) 0.02 seconds. b) 0.02 teraseconds. c) 2,500 milliseconds. d) 25,000 nanoseconds

In order to answer the question, we convert the measurements given to a common base unit. For this case, we use seconds.

A)   0.02 seconds
B)   0.02 teraseconds x (10^12 s / 1 terasecond) = 2x10^10 seconds
C)   2,500 milliseconds x (1 s / 1000 ms) = 2.5 seconds
D)   25,000 nanoseconds x (1 x 10^-9 s / 1 nanosecond) = 2.5 x 10^-5 seconds

Therefore, among the choices listed above the correct answer is D.

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.