Find A-1 if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Answer: D
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Suppose u and v are differentiable functions of x. Use the given values of the functions and their derivatives to find the value of the indicated derivative.u(1) = 5, u '(1) = -6, v(1) = 6, v '(1) = -3.
(3v - u) at x = 1
A. 23 B. 13 C. -15 D. -3
Solve the problem.The seamstress has a length of 18 feet of material on a bolt. She plans to use the material to make scarves. If each scarf requires a length of 7
inches, how many can be made? (1 foot = 12 inches)
A. 29 scarves B. 2 scarves C. 162 scarves D. 28 scarves
Solve the problem.A ship travels 84 km on a bearing of 16°, and then travels on a bearing of 106° for 155 km. Find the distance from the starting point to the end of the trip, to the nearest kilometer.
A. 23 km B. 239 km C. 81 km D. 176 km
Solve the problem.A retired couple has $170,000 to invest to obtain annual income. They want some of it invested in safe Certificates of Deposit yielding 5%. The rest they want to invest in AA bonds yielding 11% per year. How much should they invest in each to realize exactly $16,300 per year?
A. $130,000 at 12% and $60,000 at 5% B. $120,000 at 5% and $70,000 at 12% C. $140,000 at 12% and $50,000 at 5% D. $130,000 at 5% and $60,000 at 12%