Solve the problem.A church steeple casts a shadow 104 ft long, and at the same time a 8.0-ft post cast a shadow 6.0 ft long. How high is the steeple? Round to the nearest unit.
A. 139 ft
B. 108 ft
C. 78 ft
D. 8 ft
Answer: A
Mathematics
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The concentration of hydrogen ions in blood is 3.98 × 10-8. What is the pH of blood?
A. 8.0 B. 3.98 C. 6.6 D. 7.4
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Find all square roots of the number.1225
A. -35, 35 B. -37, 37 C. -70, 70 D. -36, 36
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Write the fraction as a decimal.
A. 0.8 B. 0.6 C. 0.75 D. 0.4
Mathematics
Select the ordered pair that is a solution of the system of equations.
?
?
A. (1, 13) B. (13, -1) C. (-1, -13) D. (1, -13) E. (13, 1)
Mathematics