the dimensions of a room or 16 into 14 in there are four Windows of 1.3 metres into 1.4 cm and to those of two metres into one metre what will be the cost of whitewashing the walls and painting the doors and windows if the rate of whitewashing is rupees 5 per metre square and rate of painting is rupees per metre square​

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!

a. she will receive a refund of $278.

step-by-step explanation:

i think the answer is b.

step-by-step explanation:

not 100% sure though.