.. Use the balanced hanger diagram to choose the equation that best represents how to find the mass of the triangle:
a. 2t + 21 = 5t + 12
b. 7t = 33
C. 2t + 24 = 5t + 13
d. 7t = 9

the first option is the answer.

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!