Determine the integral by making an appropriate substitution.

A.  + C
B. x4(x4 + 7)3/2 + C
C. (x4 + 7)3/2 + C
D. (x4 + 7)3/2 + C


Answer: D

Mathematics

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The table below shows the number C, in millions, of cell phone subscribers t years after 2005.  t 0 1 2 3 4 C 211.90 236.17 253.41 276.33 288.64? A: Use exponential regression to model the number of subscribers as a function of time. Round your answer to two decimal places.B: Plot the exponential model along with the data points.C: According to the exponential model, what is the yearly percentage increase in cell phone subscribers? Round your answer to the whole number.

What will be an ideal response?

Mathematics

Find the length and direction (when defined) of u × v.u = 5i, v = 3j

A. 5; 3k B. 15; 15k C. 15; k D. 15; -k

Mathematics

The problem describes procedures that are to be applied to numbers. Repeat the procedure for four numbers of your choice. Write a conjecture that relates the result of the process to the original number selected.Select a number. Multiply the number by 16. Add 16 to the product. Divide this sum by 8. Subtract 2 from the quotient.

A. The result is the original number. B. The result is one more than the original number. C. The result is double the original number. D. The result is one more than double the original number.

Mathematics

Perform the operation. Write the answer as a fraction in lowest terms. ? 

A.
B.
C.
D.

Mathematics