Solve the proportion for the variable by cross-multiplying.
= 
A. x = 5.23
B. x = 15.49
C. x = 0.06
D. x = 1067.14
Answer: C
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Decide whether the relation is a function.?
A. Function B. Not a function
Solve the problem.The polynomial -0.1t2 + 8t describes the average number of digits that participants in a memorization experiment were able to recall after t minutes. Find the number of digits recalled after 6 minutes. Round to the nearest digit.
A. 44 digits B. 64 digits C. 24 digits D. 84 digits
Solve.The coroner arrives at the scene of a murder at 11 p.m. She takes the temperature of the body and finds it to be 86.7° F. She waits 1 hour, takes the temperature again, and finds it to be 84.9° F. She notes that the room temperature is 67° F. When was the murder committed?
A. 7 p.m. B. 5 p.m. C. 8 p.m. D. 6 p.m.
In each group of four products, one is wrong. Use estimation to determine which product is incorrect.
A. 191 × 46 = 8786 B. 313 × 82 = 26,096 C. 394 × 80 = 31,520 D. 34 × 348 = 11,832