Add or subtract measurement numbers, rounding to the correct precision.17 mph + 38.6 mph + 65 mph
A. 120 mph
B. 120.5 mph
C. 120.6 mph
D. 120.7 mph
Answer: C
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Solve the problem.The pH of the blood of a small mammal usually falls between 7.28 and 7.49. Find the corresponding bounds of [H3O+].
A. 10-7.49 and 10-7.28 B. e-7.49 and e-7.28 C. log10 7.28 and log10 7.49 D. 107.49 and 107.28
Let x be a number. Translate the English phrase or sentence into a mathematical expression. Four less than a number
A. x + 4 B. 4 - x C. 4x D. x - 4
Solve the problem by estimating.Don traveled for 4 weeks in Africa last year and spent $2421 while he was there. Estimate the average amount he spent each day. Round the number of days to the to the nearest ten and the amount of money spent to the nearest hundred.
A. $800 B. $80 C. $700 D. $70
Perform the indicated operations. Write the answer in simplest form. 
÷ 
A. 
B. 
C. 
D. 