Afire hydrant 2.5 feet high casts a 5 foot shadow how tall is a street light that casts a 26 ft shadow at the same time

13 feet

Using similar triangles to solve, that is the ratios of corresponding sides are equal

let the height of the street light be h, then it corresponds to the height of the fire hydrant and the shadows of both correspond to each other, hence

= ( cross- multiply )

5h = 65 ( divide both sides by 5 )

h = 13

the height of the street light is 13 feet

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

ome people is not even worth it to even try it in the air.

step-by-step explanation: