Find the product.(8a - 9)2
A. 64a2 - 144a + 81
B. 8a2 + 81
C. 64a2 + 81
D. 8a2 - 144a + 81
Answer: A
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Use Euler's method with the specified step size to approximate the solution.Use Euler's method with h = 0.5 to estimate y(2.5) if y' = 
and y(0) = 5. Round your answer to four decimal places.
A. y(2.5) ? 89.5263 B. y(2.5) ? 115.8961 C. y(2.5) ? 60.6623 D. y(2.5) ? 113.2069
Determine if the given function y = f(x) is a solution of the accompanying differential equation.Differential equation: xy' + y = 
Initial condition: y(9) = 2Solution candidate: y = 
+ 
A. Yes B. No
Identify the independent variable and the dependent variable.Let F be the temperature (in degrees Fahrenheit) of an oven, and let T be the number of minutes it takes to bake brownies.
A. F independent, T dependent B. T independent, F dependent
Solve the problem.A rectangle has a length of x + 3 and a width of x - 3, and has an area of 40 square units. Find the length and width of the rectangle. (A = LW)
A. width = 4 units; length = 10 units B. width = 5 units; length = 8 units C. width = 1 unit; length = 40 units D. width = 2 units; length = 20 units