Athumb tack is about 0.85 cm long. write the length of the thumbtack as a fraction in simplest form.

17/20 cm

Step-by-step explanation:

At first it would be 85/100. Then you would divide both the numerator and denominator by 5 to get 17/20

first option

a function is a relation in which an input is paired with exactly one output.

so, let's find the right answer.

in our first option, our inputs are january, february, and march. the outputs are 30, 28, and 25. each input has it's own output. this is correct!

our second option we know is incorrect, because ms. valverade has two outputs, dogs and cats. this is not a function.

our third option is incorrect as well. the yellow square has two ouputs, the square and the triangle.

lastly, in our fourth option, we see the number 7 two times with a different output. therefore, this is not a function.

remember: each input must be paired with only one output!

incomplete question. how do you expect anyone to you when you do not post the question in its entirety?