Solve the problem.Find an equation for the level curve of the function f(x, y) = 
that passes through the point 
.
A. y = 81
B. y = -81
C. y = ± 9
D. y = 9
Answer: D
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Use Euler's method to approximate the solution. Also find the exact solution. Round your answers to four decimal places.Use Euler's method with ?x = 0.2 to approximate y(1) given that 
and y(0) = 
. Also find the exact value of y(1). 
A. y(1) ? 1.8562; the exact solution is y(1) = 1.6310 B. y(1) ? 1.0368; the exact solution is y(1) = 1.3591 C. y(1) ? 1.0728; the exact solution is y(1) = 1.0873 D. y(1) ? 1.2442; the exact solution is y(1) = 1.3591
Translate to an equation and solve.22,104 is 180% of what number?
A. 3,978,720 B. 12,280 C. 122.8 D. 39,787.2
Determine if the function is one-to-one.
A. Yes B. No
The graph of a function is sketched below.
?
?
Determine the interval on which the function is decreasing.
?
A. (-?, -3] ? [-1, ?) B. ?[-3, -1] C. ?[-1, -1]? D. ?[1, 3]? E. (-?, -3] ? [-1, ?)?