Evaluate the Expression $5 ^ { - 1 } + 2 ^ { - 1 }$

question 64

Multiple Choice

Evaluate the expression.
- $5 ^ { - 1 } + 2 ^ { - 1 }$

• A)2
• B) \(\frac { 1 } { 3 }\)
• C) \(\frac { 10 } { 7 }\)
• D) \(\frac { 7 } { 10 }\)

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Definitions:

Exponential Smoothing Model

A time series forecasting method that applies weighting factors which decrease exponentially to past observations.

Simple Exponential Smoothing

A time series forecasting method for univariate data that uses a weighted average of past observations, with the weights declining exponentially as the observations get older.

Mean Absolute Deviation

A measure of variability that represents the average absolute difference between each data point and the mean of the dataset.

Sales Details

Specific information related to the quantity, price, and attributes of goods or services sold.