Answer & Step-by-step explanation:
The circumference is basically the perimeter of a circle. The circumference of a circle is found by multiplying the diameter by π (pi):

or by multiplying the radius (which is half of the diameter) by 2 and π:

12 x 8= 96
10 x 8 =80
12 × 10= 120
120+80+96= 296
Answer:-3x-21
Step-by-step explanation: use the distributive property
Answer: 28 feet.
Step-by-step explanation:
Given: During the winter months, freshwater fish sense the water getting colder and swim to the bottom of lakes and rivers to find warmer water.
The total depth of the lake = 32 feet
Since, fish swims 7/8 of the depth, then the depth of lake to which the fish swim=
Since, 
therefore, 
Hence, the fish swim 28 feet in lake.