Alex draws the scale model shown as a plan for a large wall mosaic. 10 cm 12 cm a. The wall is 10 m wide and 7 m high. What are the dimensions of the largest mosaic he can make on that​ wall? Explain. b. He will use​ 2-cm square tiles to make his mosaic. How many tiles will he​ need? Explain how you found your answer.

b

step-by-step explanation:

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

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).

b. hoped i'm right lol

step-by-step explanation: