Jay’s dog weighs 35 kilograms and is overweight. The dog is put on a diet, losing 0.4kg every week. How long does it take to reach the target weight of 28 kilograms? (This is a question from arithmetic sequence)

17.6 weeks

Step-by-step explanation:

The computation of the time taken to reach the target weight is shown below:

35, 34.6, 34.228

As we know that

a_n = a + (n - 1)d

28 = 35 + (n - 1)(-0.4)

28 = 35 -0.4n + 0.4

28 = 35.04 - 0.4n

0.4n = 35.04 - 28

0.4n = 7.04

n = 17.6

there is no grid

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

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