Answer:

Explanation:
The equations for the horizontal and vertical position of the ball are, respectivelly:
![4.570\,m = [(7.157\,\frac{m}{s})\cdot\cos \theta]\cdot t\\3.050\,m = 2.440\,m +[(7.157\,\frac{m}{s})\cdot \sin \theta]\cdot t - \frac{1}{2}\cdot (9.807\,\frac{m}{s^{2}} )\cdot t^{2}](https://tex.z-dn.net/?f=4.570%5C%2Cm%20%3D%20%5B%287.157%5C%2C%5Cfrac%7Bm%7D%7Bs%7D%29%5Ccdot%5Ccos%20%5Ctheta%5D%5Ccdot%20t%5C%5C3.050%5C%2Cm%20%3D%202.440%5C%2Cm%20%2B%5B%287.157%5C%2C%5Cfrac%7Bm%7D%7Bs%7D%29%5Ccdot%20%5Csin%20%5Ctheta%5D%5Ccdot%20t%20-%20%5Cfrac%7B1%7D%7B2%7D%5Ccdot%20%20%289.807%5C%2C%5Cfrac%7Bm%7D%7Bs%5E%7B2%7D%7D%20%29%5Ccdot%20t%5E%7B2%7D)
By isolating each trigonometric component and summing each equation:
![20.885\,m^{2} = [51.223\,\frac{m^{2}}{s^{2}}\cdot \cos^{2} \theta]\cdot t^{2}](https://tex.z-dn.net/?f=20.885%5C%2Cm%5E%7B2%7D%20%3D%20%5B51.223%5C%2C%5Cfrac%7Bm%5E%7B2%7D%7D%7Bs%5E%7B2%7D%7D%5Ccdot%20%5Ccos%5E%7B2%7D%20%5Ctheta%5D%5Ccdot%20t%5E%7B2%7D)
![[0.61\,m + \frac{1}{2}\cdot (9.807\,\frac{m}{s^{2}} )\cdot t^{2}]^{2} = [51.223\,\frac{m^{2}}{s^{2}}\cdot \sin^{2} \theta]\cdot t^{2}](https://tex.z-dn.net/?f=%5B0.61%5C%2Cm%20%2B%20%5Cfrac%7B1%7D%7B2%7D%5Ccdot%20%289.807%5C%2C%5Cfrac%7Bm%7D%7Bs%5E%7B2%7D%7D%20%29%5Ccdot%20t%5E%7B2%7D%5D%5E%7B2%7D%20%3D%20%5B51.223%5C%2C%5Cfrac%7Bm%5E%7B2%7D%7D%7Bs%5E%7B2%7D%7D%5Ccdot%20%5Csin%5E%7B2%7D%20%5Ctheta%5D%5Ccdot%20t%5E%7B2%7D)


The positive real roots are:

The needed angle is:
![\theta = \cos^{-1} [\frac{4.570\,m}{(7.157\,\frac{m}{s} )\cdot t} ]\\\theta_{1} = 86.491^{\textdegree}\\\theta_{2} = NaN](https://tex.z-dn.net/?f=%5Ctheta%20%3D%20%5Ccos%5E%7B-1%7D%20%5B%5Cfrac%7B4.570%5C%2Cm%7D%7B%287.157%5C%2C%5Cfrac%7Bm%7D%7Bs%7D%20%29%5Ccdot%20t%7D%20%5D%5C%5C%5Ctheta_%7B1%7D%20%3D%2086.491%5E%7B%5Ctextdegree%7D%5C%5C%5Ctheta_%7B2%7D%20%3D%20NaN)
Answer:
Image (c) is a convex lens
Explanation:
The lenses are of two types i.e. concave lens and convex lens. Figure (3) shows a convex lens. The blue arrows represent the direction of light as it interacts with the lenses. It is also known as converging lens. It is because, it converge all the rays of light that are coming parallel to principal axis at focal point (F).
The image formed by convex lens is real and inverted always. But when the object is placed between the focus and the optical center of the lens, the formed image is virtual and erect.
So, the correct option is (c).
I believe that pandas can only have 1 cub at a time. (Online it says 1.5 cubs but I’m not quite sure how half a cub would work) Their gestation period (how long it takes them to have their cub) is 3-5 months. This is for a giant panda.
Plasma is the forth state of matter becasue of its unique properties compared to other states of matter such as how it reacts to electromagnetism
Its acceleration in the sandy patch is 
Explanation:
The average speed

Time to pass patch

The acceleration

Hence,
that the acceleration in the sandy patch.
<h3>
What do you understand by the acceleration? </h3>
Any procedure where the velocity varies is referred to as acceleration. There are only two ways to accelerate: changing your speed or changing your direction, or changing both. This is because velocity is both a speed and a direction.
The meter per second per second (m/s2) unit of acceleration. Definition. The newton is the unit of force that, when applied to a mass of one kilogram, results in a one-meter-per-second acceleration.
Changing the speed at which an object is travelling is what acceleration is all about. A substance is not accelerating if its velocity is not changing.
To learn more about the acceleration, Visit: brainly.com/question/190239
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