Given h(x)=2√x-5, which of the following statements describes h(x)
a. The function h(x) is increasing on the interval (-[infinity] ,5).
b. The function h(x) is increasing on the interval (5,[infinity] ).
c. The function h(x) is decreasing on the interval (-5,[infinity] ).
d. The function h(x) is decreasing on the interval (-[infinity] ,-5).