If you perform 3 units, what is the upper bound of the time range?

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Multiple Choice

If you perform 3 units, what is the upper bound of the time range?

This question tests recognizing a fixed, linear increase in the time range as you perform more units. Each additional unit pushes both ends of the interval upward by the same amount. Look at how the ranges progress: 8-22 for the first unit, 23-37 for two units, 38-52 for three units. From one to the next, both the lower and upper bounds go up by 15 minutes. Applying that pattern again would give 53-67 for four units, confirming the step size. You can also express the time range for n units as [8 + (n−1)×15, 22 + (n−1)×15]. For three units, that becomes [38, 52]. So the upper bound is 52 minutes, giving the range 38-52.

This question tests recognizing a fixed, linear increase in the time range as you perform more units. Each additional unit pushes both ends of the interval upward by the same amount.

Look at how the ranges progress: 8-22 for the first unit, 23-37 for two units, 38-52 for three units. From one to the next, both the lower and upper bounds go up by 15 minutes. Applying that pattern again would give 53-67 for four units, confirming the step size.

You can also express the time range for n units as [8 + (n−1)×15, 22 + (n−1)×15]. For three units, that becomes [38, 52]. So the upper bound is 52 minutes, giving the range 38-52.

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