The circumference of circle z is 84cm. what is the length of xy (the minor arc)?

21 cm

Step-by-step explanation:

The circumference is 84

90degrees  out of 360 degrees in a circle is 90/360 = 1/4

The arc is 1/4 of the circle, so it is 1/4 of the circumference

1/4 * 84  = 21 cm

A

Step-by-step explanation:

The length of the minor arc XY can be calculated using

XY = circumference × fraction of circle

    = 84 × = 84 × = 21 cm → A

250

step-by-step explanation:

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

pls mark as brainliest