Use the unit circle to determine the value of the given expression or state that it is undefined.sec (-90°)
A. -1
B. 1
C. 0
D. undefined
Answer: D
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For the graph below, use the nearest neighbor algorithm to find an approximate minimum Hamilton circuit and its weight, starting at the indicated vertex.
Starting at D
A. D ? C ? A ? F ? E ? B ? D; weight = 102 B. D ? C ? B ? F ? E ? A ? D; weight = 102 C. D ? C ? B ? F ? E ? A ? D; weight = 99 D. D ? C ? B ? F ? A ? E ? D; weight = 99
Evaluate the expression for the given values. Expression your answer as a fraction unless otherwise indicated.2x + 8y + 7; x = 2, y = 6
A. 59 B. 19 C. 35 D. 57
Solve the problem.How long will it take for $9800 to grow to $46,100 at an interest rate of 2.1% if the interest is compounded continuously? Round the number of years to the nearest hundredth.
A. 0.74 yr B. 73.73 yr C. 7.37 yr D. 7373.48 yr
A woman needs $6720 in 12 years to pay for her child's college tuition. She wants to deposit an equal amount at the end of each year into an account paying 10% interest compounded annually. Let yn represent the amount in the account at the end of the year. 
Find the solution for the difference equation.
A. yn = 6720(1.1)n B. yn = -10D + 10D(1.1)n C. yn = 10D - 10D(1.1)n D. yn = 6720 + 672n E. none of these