The diameter of a circle is 21 inches. Find the area of the circle. (Use 22/7 as the approximation of pi.)

Step-by-step explanation:

Area of a circle is pi times r-square

So...

Do the rest yourself, my calculator and pen are not handy. Sorry

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

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can i see the following ?

step-by-step explanation: