Apuffy white cloud with a flat bottom

a. cumulus

b. fog

c. stratus

d. cumulonimbus

The correct answer is Cumulus.

These clouds look puffy and is flat in bottom. They look like cauliflower and  are white colored too.

These forms of clouds floats in the sky and seems to be like floating cotton. They are located at 3300 feet above the ground.

They always grow in upward direction and can sometimes form giant structures which are known a the giant cumulonimbus which is responsible for thunderstorms.

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.