Solve.A fire fighter needs to estimate the height of a burning building. She estimates the length of her shadow to be 7
feet long and the length of the building's shadow to be 72 feet long. Find the height of the building if the fire fighter is 5 feet tall.
A. 120 ft
B. 108 ft
C. 79.5 ft
D. 48 ft
Answer: D
Mathematics
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Solve.How much pure acid should be mixed with 9 gallons of a 50% acid solution in order to get an 80% acid solution?
A. 4.5 gal B. 13.5 gal C. 36 gal D. 22.5 gal
Mathematics
Evaluate the expression.|10(-2)| - |1 - 8|
A. -27 B. 27 C. -13 D. 13
Mathematics
Subtract and check.
A. 444 B. 990 C. 344 D. 438
Mathematics
Multiply and simplify.
? 
A. 
B. 
C. 
D. 
Mathematics