A digital camera with an original price tag of $500 was marked down by 40%. You have a coupon good for an additional 30% off. What is the effective decay factor?

70%

Step-by-step explanation:

the camera is marked down 30 plus 40 which is 70%

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!

this is false ^.^ lol