Write the number in expanded form.7,000
A. (7 ? 103) + (0 ? 102) + (0 ? 101) + (0 ? 100)
B. (7 ? 100) + (0 ? 101) + (0 ? 102) + (0 ? 103)
C. (7 ? 104) + (0 ? 103) + (0 ? 102) + (0 ? 101)
D. (7 ? 101) + (0 ? 102) + (0 ? 103) + (0 ? 104)
Answer: A
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Find the indicated derivative.Find y " if y = 5x sin x.
A. y " = 10 cos x - 5x sin x B. y " = - 10 cos x + 5x sin x C. y " = 5 cos x - 10x sin x D. y " = - 5x sin x
Solve.Armando and Luisa bought a rectangular building lot in a suburb of Austin, Texas. It measured 78.6 feet by 99.8 feet. What is its area in square feet?
A. 7844.28 square feet B. 7744.28 square feet C. 6794.28 square feet D. 7955.38 square feet
Solve the inequality numerically. Approximate endpoints to the nearest tenth.
x - 7.3 < 0
A. x > -14.7 B. x > 15.1 C. x < 15.1 D. x < -14.7
Perform the indicated operations and write the answer in the form 
where a and b are real numbers.8i + (-2 - i)
A. -2 + 7i B. -2 + 9i C. 2 - 9i D. 2 - 7i