Suppose the figure below is an exaggerated diagram of a plane flying above the earth. The plane is 5.05 miles above the earth and the radius of the earth is 4,000 miles. 
To each of your answers, apply the rules regarding the use of significant digits when determining your answer. Round the distance to the nearest miles and the angle to the nearest tenth of degree.
How far is it from the plane to the horizon? __________ mi
What is the measure of angle A ? __________ °
Definitions:
Regression Discontinuity
A statistical method used to estimate the causal effect of a treatment by assigning a cutoff point and analyzing the outcomes immediately above and below that cutoff.
Type 2 Diabetes
A chronic condition that affects the way the body processes blood sugar (glucose), characterized by insulin resistance.
Threshold
The minimum level of stimulus required to achieve a response or action, or the point at which a significant change occurs.
Usage Tax
A tax imposed on the use or consumption of certain products or services.
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