Determine the number of significant digits in the given approximate number.7,080
A. 2
B. 3
C. 4
D. 1
Answer: B
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Use the guidelines to evaluate the study. From the information given, what is the biggest flaw in the study?A health researcher randomly selected 500 high school students from the city of Oak Grove. In a private interview the researcher asked the students whether they had ever used drugs. She concluded that only 8% of the high school students of Oak Grove have ever used drugs.
A. The source of the study B. The setting may discourage honest responses C. The wording of the question D. Participation bias E. Selection bias
A formula is given, along with values for all but one of the variables in the formula. Find the value of the variable that is not given.P = 2L + 2w; L = 8, w = 4
A. P = 64 B. P = 12 C. P = 24 D. L = 24
Solve the problem.The quadratic function 
models the median, or average, age, y, at which U.S. men were first married x years after 1900. In which year was this average age at a minimum? (Round to the nearest year.) What was the average age at first marriage for that year? (Round to the nearest tenth.)
A. 1950, 26.5 years old B. 1936, 47 years old C. 1950, 47 years old D. 1952, 36 years old
Add or subtract and simplify.(5 - 7i) + (6 + 9i)
A. -1 + 16i B. 11 - 2i C. 11 + 2i D. -11 - 2i