Need help with this!!

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer