Abird is in a tree 30 feet off the ground and drops at twigs at lands on a rose bush 25 ft below. the function h(t)=-16t^2+30, where t represents the time in seconds gifts the height h and feet of the twig above the ground as it falls when will the twig land on the bush

After 1.25 seconds the twig land on the bush.

Step-by-step explanation:

Given function that shows the height of twig from the ground after t seconds,

When twig is on the bush,

h(t) = 5 feet   ( ∵ the distance from bush to ground = 30 - 25 = 5 feet )

Since, time can not be negative,

Hence, t = ≈ 1.25

Therefore, after 1.25 seconds the twig land on the bush.

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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