Express the complex number 5/2 (cos150° + i sin150°) in standard a + bi form.

1) cos (150°)=- cos(180°-150°) = - cos(30°) and  - cos30° =  - √(3) / 2

sin(150°) = sin(180°-150°) =sin30. and sin30° = 1/2

Then : 5/2(cos 150° + i sin 150°) becomes : 5/2{(-√(3) /2 + I (1/2)]

OR 5/4( - √3 + i)

Step-by-step explanation:

answer is a

Step-by-step explanation:

the volume is everything on the inside of the tank

surface area would only be the amount of water it take of cover one side

area would just be the size of the glass on bottom

the perimeter would just be the length of all four edges of each side of the fish tank