Solve.A 21-inch-square TV is on sale at the local electronics store. If 21 inches is the measure of the diagonal of the screen, use the Pythagorean theorem to find the length of the side of the screen to the nearest tenth of an inch.

A. 14.8 in.
B. 4.6 in.
C. 220.5 in.
D. 2.3 in.


Answer: A

Mathematics

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Letting r stand for "The food is good," p stand for "I eat too much," and q stand for "I'll exercise," write the following in symbolic form.If I eat too much, then I'll exercise.

A. q ? p B. r ? p C. p ? q D. p ? q

Mathematics

Solve the problem.The sales of a new model of notebook computer are approximated by , where x represents the number of months the computer has been on the market and S represents sales in thousands of dollars. In how many months will the sales reach $1,500,000?

A. 13 months B. 17 months C. 10 months D. 20 months

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Find the sum of the series.

A. 86 B. 44 C. 102 D. 78

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Determine if the given solution is correct. If it is not, find the solution.Is  the solution to 2x = 55

A. no; x = 
B. yes
C. no; x = 
D. no; x = 110

Mathematics