Answer:
here you go.
Step-by-step explanation:
it's it the picture. I hope it helps
A stuntman jumping off a 20-m-high building is modeled by the equation h = 20 – 5t2, where t is the time in seconds. A high-speed camera is ready to film him between 15 m and 10 m above the ground. For which interval of time should the camera film him?
Answer:
Step-by-step explanation:
Given:
A stuntman jumping off a 20-m-high building is modeled by the equation
-----------(1)
A high-speed camera is ready to making film between 15 m and 10 m above the ground
when the stuntman is 15m above the ground.
height
Put height value in equation 1
We know that the time is always positive, therefore
when the stuntman is 10m above the ground.
height
Put height value in equation 1
Therefore ,time interval of camera film him is
Answer:
b) 15.2km
c) Bearing= 263.8° (1 d.p.),
AD= 25.5 km (3 s.f.)
Step-by-step explanation:
Please see attached picture for full solution.
In picture 3, you could also use trigonometry to find AW, just like how we did to find W.
Picture 4:
WD= 16 -15.250
WD= 0.75
Picture 5:
Bearing of D from A
= reflex ∠N₂AD
= 295° - ∠BAD
∠BAD
= ∠BAW -∠WAD
= 33° -1.829°
= 31.171°
Thus, bearing of D from A
= 295° - 31.171°
= 263.8° (1 d.p.)
c) Distance of D from A= length AD
Look at triangle BAD:
∠DBA= 65°
∠ADB= 180° -65° -31.171° (∠ sum of △ADB)
∠ADB= 83.829°
Using sine rule,
Feel free to ask if you have any queries :)
Answer: С. 3x +2
Step-by-step explanation:
We have the following trinomial, which is also known as perfect square trinomial, because the first and the third term are squares:
(1)
First term:
Third term:
If we factorize this expression we have:
As we can see, the trinomial (1) has two factors:
and
Therefore, the correct option is C.
Answer:
900
Step-by-step explanation:
its easy