Use the regression feature of a graphing utility to find a linear model for the data. Let t represent the year, with t = 9 corresponding to 1999. Use the model to predict the average lengths of cellular phone calls for the year 2010. Round your answer to two decimal places.
The average lengths L of cellular phone calls in minutes from 1999 to 2004 are
shown in the table below.
A) 7.52 minutes
B) 2.76 minutes
C) 4.76 minutes
D) 1.88 minutes
E) 3.76 minutes
E) 3.76 minutes
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Answer the question.If n is an odd number, then which of the following statements is true?
A. The equation xn + 1 = 0 has exactly one real root. B. The equation xn + 1 = 0 has n + 1 roots. C. The equation xn + 1 = 0 has an odd number of nonreal roots. D. The equation xn + 1 = 0 has an even number of real roots.
Solve.Find which is the better buy (lower cost per ounce) by finding each unit price rounded to three decimal places if necessary. Assume that different sizes of the same brand are being compared. Frozen orange juice: $4.23 for 18 ounces $2.82 for 12 ounces
A. $4.23 for 18 ounces B. $2.82 for 12 ounces C. Both cost the same per ounce.
The bar graph below shows the number of students by major in the College of Arts and Sciences. Answer the question.
The English department assigns a counselor to each student majoring in English. Each counselor is assigned 50 students. How many counselors are needed?
A. 10 B. 15 C. 12 D. 8
Find the area of the triangle. If necessary, round the answer to two decimal places. 
A. 101.49 B. 9.23 C. 25.37 D. 31.21