#find the proper function or method that count how many 10.0 items there are in student_grades and print out 
#the output using the print() function

student_grades = [9.1, 8.8, 10.0, 7.7, 6.8, 8.0, 10.0, 8.1, 10.0, 9.9]
print(student_grades.count(10.0))