Joe rings 26 friends to his party phone calls cost 12p a minute to a landline and 25p a minute to a mobile phone he rings 16 of his friends on their mobile phones and 10 of his friends on landlines each phone call lasts for 2 minutes how much will it cost him to phone all 26 friends?

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

just take the area of the square and then the area of the circle then subtract the circle area from the squares area

step-by-step explanation:

the answer is b.

step-by-step explanation: