Answer the question.Give a definition of Domain.
What will be an ideal response?
The set of all values of the independent variable (x)
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Solve the problem.An airplane is sighted at the same time by two ground observers who are 2 miles apart and both directly west of the airplane. They report the angles of elevation as 12° and 
How high is the airplane? Round to the nearest hundredth of a mile.
A. 0.95 mi B. 0.42 mi C. 0.72 mi D. 1.64 mi
Solve the problem.In 2012, the average annual salary for elementary school teachers was $24,269. In 2017, the average annual salary for elementary school teachers was $28,148. Let y be the average annual salary in the year x, where x = 0 represents the year 2012.a) Write a linear equation that models the average annual salary for elementary school teachers in terms of year x.b) Use this equation to determine the average annual salary for elementary school teachers in 2014.
A. a) y = 770.8x + 24,269 b) $25,820.60 B. a) y = 775.8x + 24,269 b) $26,596.40 C. a) y = 770.8x + 24,269 b) $25,810.60 D. a) y = 775.8x + 24,269 b) $25,820.60
Solve the problem.A drug company is running trials on a new test for anabolic steroids. The company uses the test on 400 athletes know to be suing steroids and 200 athletes known not to be using steroids. Of those using steroids, the new test is positive for 390 and negative for 10. Of those not using steroids, the test is positive for 10 and negative for 190. What is the estimated probability of a false negative result (the probability that an athlete using steroids will test negative)?
A. 0.05 B. 0.975 C. 0.025 D. 0.95
Find the indicated sum.a1 = 
, r = -2; find s13
A. 
B. 
C. 
D. 