#1 [A-4 points, T-3 points) Shadib operates a printing machine and the cost, in dollars, of operating this machine per day
is given by the formula C = 21 - 84t + 1025 where t is the time, in hours, the machine
operates.
a) What is the minimum cost of running the machine and for how many hours must the machine
run to reach the minimum cost?
b) On a certain day the cost of running the machine was estimated to be close to $300. For how
many hours could the machine have been operating on that particular day? Fully explain your
answer.

the answer is true.

step-by-step explanation:

a function could be identified in 3 ways either on a chart,graph, or ordered pairs. first a function is that each point has its own. the rule is that there can be many x's to one y but there can not be 2 x's at different y's. so on a graph when you put a straight line through the y's there should be one dot only to be a function.

step-by-step explanation:

you have to wait a while to reward brainliest if only one person answers. if 2 people answer there should be a "mark brainliest" on their question.

i cant fully remember all of the ranks, here are the ones i remember.

hand, ambitous, ace, genius.