b) The diameter of a circular coin is 1:14 cm. How many coins of the same size are required to place in a Straight row to cover 19.1 m distance?​

It will take about 1675 whole 1.14 cm coins to make a straight row of 19.1 m distance

Step-by-step explanation:

1 meter = 100 cm

19.1 meter x 100 = 1910 cm

Divide the total distance by the width of a coin.

1910 cm / 1.14 cm = 1675.43

Round up. It would take 1,676 coins

step-by-step explanation:

; fx

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.