Ten cupcakes cost 15$. how much does one cupcake cost?

1.5$

Step-by-step explanation:

10 cupcakes =15$

so, 1 cupcake = 15/10

                          i.e. 1.5

.: 1cupcake cost = 1.5$

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.