Bonita said that the product of 5 6 56   × 1 2 3 23 is 7 3 73 . how can you tell that her answer is wrong?

the last digits of the numbers being multiplied are 6 and 3

resulting in a product of 18

thus the last digit in her answer would have to be an 8 not a 3

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.