7. A merry-go-round with a diameter of 80 feet has horses placed in circles 40 ft, 35 ft, and 30 ft from the center. The horses in the 40 ft circle make
one revolution every 20 seconds. Find the linear velocity, in feet per
minute, of the horses in the 30 ft circle. Round to the nearest tenth.

the answer is d

step-by-step explanation:

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.