This is the definition of a rational number.
Answer:
1.524
Step-by-step explanation:
Let:
x = Chemistry textbooks sold
y = Physics textbooks sold
The textbook store sold a combined total of 260, so:

The number of chemistry books sold was three times the number of physics textbooks sold, so:

Let:

Replace (2) into (1):

Replace the value of y into (2):
Answer:
1/6 chance
Step-by-step explanation:
1/2 multiplied by 1/3
Answer:
it will take her 2 hours and 45 minutes