Hi. Could you please help me with this question?? Thanks :)

What is the perimeter of the diagram?
a.13cm
b.23cm
c.33cm
d.43cm
e.53cm

Amuffin recipe, which yields 12 muffins, calls for cup of milk for every 1 cups of flour. the same recipe calls for cup of coconut for every cup of chopped apple. to yield a batch of 30 muffins, how much flour will be needed in the mix?

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)