Use a calculator to find the approximate value of the expression. Express your answer in radians and round to three decimal places.cos-1 (-0.7221)

A. 2.378
B. -0.807
C. 3.906
D. 5.519


Answer: A

Mathematics

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The following table shows the earnings for the Juarez family last year. Use this information to answer the question.MonthEarningsMonthEarningsJan.$1400July$1300Feb.$1150Aug.$2450Mar.$2950Sept.$2500Apr.$2300Oct.$2000May$1650Nov.$2350June$2700Dec.$2400What was the family's total income from January thru June?

A. $11,000 B. $9,200 C. $12,150 D. $13,000

Mathematics

Insert < or > to form a true statement.  

A. < B. >

Mathematics

Solve the problem.Christine is currently taking college astronomy. The instructor often gives quizzes. On the past seven quizzes, Christine got the following scores. Find the standard deviation.50?20?42?29?19?48?71

A. 18.7 B. 11,120.1 C. 42 D. 13,211

Mathematics

Solve the equation by making an appropriate substitution.x - 512 - 16 = 0

A. {2048} B. {512} C. {1024} D. {768}

Mathematics