In a recent medical study testing the effectiveness of a new medication, researchers gave participants either the new medication or a sugar pill. When participants came to
get the pills, they were told whether they had been assigned to the medication or to the
sugar pills. At the conclusion of the study, researchers found the medication was more
effective than the sugar pill. Are the results valid?

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.

25% is the answer