Find the length of AB. Round to nearest tenth.

The length of AB = 23.

Solution:

Given ABC is a triangle.

BC = a = 49 m

AC = b = 56 m

∠C = 24°

Let AB = c

To find the length of AB:

Use cosine law,

The value of cos 24° = 0.9135

Take square root on both sides of the equation.

c = 22.88

c = 23 (rounding off to nearest value)

The length of AB = 23.

entering that problem on the tube might get you an answer

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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