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I am not taking all the credits
you can learn more at https://www.teachoo.com/1117/424/Ex-4.3--6---If-the-work-done-by-a-body-on-application/category/Ex-4.3/
Answer:
49
Step-by-step explanation:
9514 1404 393
3.61 seconds
The bird starts 50 feet in the air, so will come down to a height of 40 feet after 3.61 seconds.
We want to solve h = 40.
40 = -16t^2 +55t +50
16t^2 -55t -10 = 0
t = (55 +√(55^2 -4(16)(-10)))/(2(16)) = (55 + √3665)/32 ≈ 3.61060
The bird will be 40 ft above the ground the first time after about 3.61 seconds.
As it ایس the correct answer is 45
78
7.90
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,83,89,97
those are the prime numbers
HEY BABE