Answer:
The radius is growing at a rate of 
ft per minute.
Step-by-step explanation:
From the information given we know that
And we know as well that .
Since everything is changing with the time we can compute the implicit derivative and we would get that
We are told that we are looking for how fast is the radius growing at the instant when the radius has reached 1 ft, therefore 
And when we solve for
Answer:
x = 18
Step-by-step explanation:
2/3 x = 12
x = 12 × 3/2
x = 6 × 8
x = 18
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9514 1404 393
Answer:
85°
Step-by-step explanation:
The sum of arcs in a circle is 360°.
FG +140° +80° +55° = 360°
FG = 360° -275°
FG = 85°
Answer: 318 km²
Let's find the areas of the triangles
Formula: base x height / 2
9 x 6 = 54
54/2 = 27
Multiply by 2 since there are two triangles (I know, we already got the areas from 9 x 6)
27 x 2 = 54
Now let's try to find the areas of all the rectangular sides
Formula: length x width
9 x 11 = 99
8 x 11 = 88
7 x 11 = 77
99 + 88 + 77 = 264
Add up all the areas
264 + 54 = 318
