Solve the equation.
= 
A. 1
B. - 1, 
C. No solution
D. 1, - 
Answer: D
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For the initial value problem, compute the first two approximations u1 and u2 given by Euler's method using the given time step.y'(t) = 4y, y(0) = 7; ?t = 0.5
A. u1 = 35; u2 = 105 B. u1 = 21; u2 = 63 C. u1 = 21; u2 = 105 D. u1 = 7; u2 = 21
Write the expression in simplest form. If a radical appears in the denominator, rationalize the denominator.
A. 7y
B. 7y2
C. 7
D. 7
Solve the problem.When going more than 38 miles per hour, the gas mileage of a certain car fits the model 
where x is the speed of the car in miles per hour and y is the miles per gallon of gasoline. Based on this model, at what speed will the car average 15 miles per gallon? (Round to nearest whole number.)
A. 149 mph B. 73 mph C. 48 mph D. 98 mph
Write the equation as an equivalent logarithmic equation.23 = 8
A. log2(8) = 3 B. log2(3) = 8 C. log8(2) = 3 D. log3(8) = 2