Simplify. Write the answer as a mixed number as needed.
× 2
+ 
A. 
B. 1
C. 2
D. 
Answer: B
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Solve the problem. Use a calculator with an LN or a LOG key.The height in meters of girls of a certain tribe is approximated by 
where t is the girl's age in years and 
Estimate the height (to the nearest hundredth of a meter) of a girl of the tribe 4 years of age.
A. 1.12 m B. 0.52 m C. 0.77 m D. 0.96 m
An x-ray of a leg bone fracture was made. On the x-ray film a crack in the bone measured 6.25cm in length. A measuring rod with an actual length of 10.0cm was x-rayed beside the leg. The rod's length was measured to be 12.5cm on the s-ray film. What is the actual length of the crack in this bone?
A. 7.8cm B. 5.0cm C. 7.5cm D. 6.25cm
Solve the problem.In chemistry, the pH of a substance is defined by 
where 
is the hydrogen ion concentration in moles per liter. Find the 
of a sample of lake water whose 
is 3.05 × 10-9 moles per liter. (Round to the nearest tenth.)
A. 10.1 B. 8.5 C. 6.4 D. 7.3
Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.log3(3x)
A. 1 B. 1 + log3x C. 3 D. x