A lighthouse is located on a small island, km away from the nearest point P on a straight shoreline, and its light makes four revolutions per minute. How fast is the beam of light moving along the shoreline when it is 1 km from P?
a. 1900 ? km/h
b. 2000 ? km/h
c. 1800 ? km/h
d. 1700 ? km/h
e. 1600 ? km/h
e. 1600 ? km/h
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Provide an appropriate response.It took 21 seconds for the temperature to rise from 10° F to 141° F when a thermometer was taken from a freezer and placed in boiling water. Although we do not have detailed knowledge about the rate of temperature increase, we can know for certain that, at some time, the temperature was increasing at a rate of 
° F/sec. Explain.
What will be an ideal response?
Find all real numbers in the interval [0, 2?) that satisfy the equation. sin(2x) - sin(4x) = 0
A. 
B. 
C. 
D. 
Represent the radical as a radical with a smaller root index. Assume any variables represent nonnegative values.
A. 
B. 
C. 
D. 
In a progressive tax system, taxes decrease as income increases.
Answer the following statement true (T) or false (F)