Answer:
I believe the answer is B :))
We know, Surface area of a Cube = 6a²
Substitute for a = 7.2
Then, SA = 6 * (7.2)²
SA = 6 * 51.84 = 311.04 Ft²
In short, Your Answer would be Option B
Hope this helps!
It's the lasts graph it intersects at 0,-3
Hey there!
We'll define x as the amount of minutes for a call.
The monthly fee is the initial value, while the cost per call is te constant. The cost per call is the coefficient of x because you're multiplying the cost/call times the number of calls.
Now, we'll look at the first company, that has no monthly fee. However, it has 14 cents/minute, so we have:
y = .14x
For the second one, we have a 22 dollar upfront fee, along with 10 cents per call. In this problem, the 10 cents is the cost per call, or the coefficient of x.
We have:
y = 22 + .10x
Now, to see when the minutes of calls will equal to when the costs are equal, we set both equations equal to each other because we want to see the value of x that works on the left and right side of the equation:
22 + .10x = .14x
Subtract .10x from both sides:
22 = .04x
Divide both sides by .04:
x = 550
If we plug it back in, we get:
22 + .10(550) = .14(550)
77 = 77
Therefore, you would need 550 calls.
Hope this helps!
