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danielanderson12
04.12.2019 •
Mathematics
Ineed some one to check if my answer is correct.
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Ответ:
To make sure just add the numbers if they equal 180 it should be correct
65 + 65 = 130
130 + 50 = 180
It should be correct :D
Ответ:
t = 6 s
Step-by-step explanation:
When Rose hit the water, the height of the jump is 0, so: h(t) = 0.
Resolving it, we have:
-16t² + 16t + 480 = 0
To simplify the second degree equation, divided it by 16:
-t² + t + 30 = 0
Now, solve the equation using Bhaskara:
Δ = 1² - 4. (-1) . 30
Δ = 1 + 120
Δ = 121
t =![\frac{-1+\sqrt{121} }{-2}](/tpl/images/0134/8789/cfb75.png)
t₁ =
= - 5
t₂ =
= 6
Since time can be negative, it took t = 6s for Rose to hit the water.