7. In a bag of marbles, the ratio of blue to red marbles is 2:3. Assuming those are the only two colors in the bag, what is the percent of blue marbles in the bag?
The percent of blue marbles in the bag is 50%

0,0

step-by-step explanation:

0.038

step-by-step explanation:

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!