The cup was filled at a
constant rate. It started empty. After 2 seconds, it held
70cm^3 of water. Find the percent of the cup that is filled
with water after 3 seconds. Use 3.14 for pi and round your
final answer to the nearest percent.

radius=4cm
high=7cm

0.2986  (29.86%)

Step-by-step explanation:

cup volume = πr²H = 3.14 x 4² x 7 = 351.68 cm³

after 3 minutes   (70 /2) x 3 =105 cm³

the percent of the cup that is filled 105/351.68 = 0.2986  (29.86%)

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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