Answer:
Step-by-step explanation:
hypotenuse is
because 14^2 + 3^2 = c^2
sin is =
cos is =
tan is
Answer:
We want to expand the expression:
We can just do it by brute force, this is:
First, rewrite our expression as the product of two square factors:
Now we can expand each one these two factors:
That can be simplified to
Now we can replace that in our original expression to get:
Now we can expand that last product, to get:
We can simplify that to:
That is the expanded expression.
Answer:
Step-by-step explanation:
she runs the air during the 4 hottest months.....30 days per month....so she runs the air for (30 * 4) = 120 days
she runs it for 7 hrs per day....so she runs it (7 * 120) = 840 hrs
at a cost of 0.25 per hr....(840 * 0.25) = $ 210 <==