Help please!!! I’m having trouble and don’t know how to word any of this or what to do!

Multiply 7*3

.

5

x√x21

your answer is 5x in square root power of 21

for b its (t) and c its (d)

step-by-step explanation:

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.