In a lab a substance was cooled by 4 degrees c each hour for 16 hours what was the total change in temperature

64 degrees

Step-by-step explanation

multiply 4 by 16 because for every hour it was cooled another 4 degrees so 4 times 16 equals 64

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!

jeff jeff

step-by-step explanation: