Solve the quadratic equation by completing the square.x2 - 4x + 1 = 0
A. -4 ± 2
B. -2 ± 
C. 2 ± 
D. 4 ± 
Answer: C
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Decide if the given equation is a solution of the given differential equation.y" + 4y = 10ex, y = -7 sin 3x - 8 cos 3x + 2ex
A. Yes B. No
Reparametrize the curve with respect to arc length measured from the point where t = 0 in the direction of increasing t.
r(t) = (3+3t)i+ (4+9t)j- (6t)k
Solve the problem.Mrs. Henson bought the following items: cheese, 
soda, 
; hamburger, 
; and gum, 
. How much did she spend in total?
A. $23.31 B. $21.44 C. $22.44 D. $22.31
Solve.A baker can decorate the day's cookie supply four times as fast as his new assistant. If they decorate all the cookies working together in 24 minutes, how long would it take for each of them to decorate the cookies working individually?
A. baker: 120 min
assistant: 480 min
B. baker: 120 min
assistant: 30 min
C. baker: 7
min
assistant: 29 min
D. baker: 30 min
assistant: 120 min