Find the derivative.
A. 
B. 
C. 
D. 
Answer: B
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Identify equilibrium values and determine which are stable and which are unstable.
= (y + 2)(y + 1)
A. y = 2 is a stable equilibrium value and y = 1 is an unstable equilibrium. B. y = 1 is a stable equilibrium value and y = -2 is an unstable equilibrium. C. y = -2 is a stable equilibrium value and y = 1 is an unstable equilibrium. D. y = -1 is a stable equilibrium value and y = 2 is an unstable equilibrium.
Find the particular solution to the given differential equation that satisfies the given conditions.
- 2
+ y = xe-6x - e-6x; 
= 0 and y = 0 when x = 0
A. y = 
ex + 
xex + 
xe-6x - 
e-6x
B. y = 
ex - 
xex + 
xe-6x - 
e-6x
C. y = - 
ex - 
xex + 
xe-6x - 
e-6x
D. y = 
ex - 
xex + 
xe-6x + 
e-6x
Estimate the product by rounding to a single nonzero digit, then find the actual product.222 ? 985
A. Estimate: 1200; Actual: 218,680 B. Estimate: 218,700; Actual: 218,670 C. Estimate: 218,670; Actual: 49,284 D. Estimate: 200,000; Actual: 218,670
Solve the problem.A school purchased 9 printers at a total cost of $2,421. Find the cost per printer.
A. $169 B. $219 C. $2,421 D. $269