Solve the Problem $$\mathrm { I } ( \mathrm { t } ) = 40 \sin \left( 60 \pi t - \frac { \pi } { 2 } \right)$$

question 67

Multiple Choice

Solve the problem.
-The function $$\mathrm { I } ( \mathrm { t } ) = 40 \sin \left( 60 \pi t - \frac { \pi } { 2 } \right)$$ represents the amperes of current produced by an electric generator as a function of time t, where t is measured in seconds. Find the smallest value of t for which the current is 20 amperes. Round your answer to three decimal
Places, if necessary.

• A) 0.008
• B) 0.011
• C) 0.017
• D) 0.033

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Definitions:

Correlational Designs

Research designs that examine the relationship between two or more variables without manipulating them, to determine if a relationship exists.

Counseling Process Research

A field of study focused on understanding the dynamics, processes, and outcomes of counseling sessions to enhance therapeutic effectiveness.

Randomization

A method used in experiments to ensure every participant has an equal chance of being assigned to any group, reducing bias.

Independent Variables

Variables in an experiment that are manipulated or changed to observe their effects on dependent variables.