Solve the numerical expression

10 x (2.5 + 13.5)

step 1 :

2.5+ 13.5 =16

step 2 :

16× 10 =160

Step-by-step explanation:

10(2.5+13.5)

10*16

160

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

1.30

step-by-step explanation: