At what points is the given function continuous?f(x, y) = ex+y
A. All (x, y) in the first quadrant
B. All (x, y) ? (0, 0)
C. All (x, y)
D. All (x, y) satisfying x + y ? 0
Answer: C
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Part of $2,600 is invested at 12%, another part at 13%, and the remainder at 14%. The total yearly income from the three investments is $347. The sum of the amounts invested at 12% and 13% equals the amount invested at 14%. Determine how much is invested at each rate.
A. $800 at 12%, $500 at 13%, $1,300 at 14% B. $400 at 12%, $900 at 13%, $1,300 at 14% C. $400 at 12%, $1,300 at 13%, $900 at 14% D. $300 at 12%, $1,000 at 13%, $1,300 at 14% E. $500 at 12%, $1,000 at 13%, $1,100 at 14%
Solve for x.log 5 x = 3
A. 8 B. 125 C. 15 D. 243
Solve the problem.Suppose the consumption of electricity grows at 5.1% per year, compounded continuously. Find the number of years before the use of electricity has tripled. Round the answer to the nearest hundredth.
A. 0.22 yr B. 58.82 yr C. 21.54 yr D. 2.15 yr
A random sample of 100 people was taken. Eighty of the people in the sample favored Candidate A. We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 75%. Refer to Exhibit 9-6. At a .05 level of significance, it can be concluded that the proportion of the population in favor of candidate A is
A. significantly greater than 75% B. not significantly greater than 75 C. 96 significantly greater than 80% D. not significantly greater than 80%