Speech-impaired people can communicate with the help of new electronic devices. The devices
contain circuit switches that are 9 x 10
mm in
length. A switch is placed beside a grain of sand.
The grain of sand has a diameter of 0.54 mm.
How many switches placed end-to-end are
needed to equal the diameter of the grain of
sand?

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!

answer: there are 453.592 grams in a pound.

tangent

step-by-step explanation: