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Rom4ik [11]
3 years ago
15

The movement of a projectile, thrown upwards vertically, is described by the equation y = - 40x

=x%5E%7B2%7D" id="TexFormula1" title="x^{2}" alt="x^{2}" align="absmiddle" class="latex-formula"> + 200x . Where y is the height, in meters, reached by the projectile x seconds after launch. Therefore, determine the instant when the projectile hits the ground.
Mathematics
1 answer:
kow [346]3 years ago
7 0
At X = 2.5 the projectile hits the ground
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Ok It takes 46 minutes for 10 people to paint 3 walls. How many minutes does it take 4 people to paint 6 walls
lesya [120]

To solve this problem, all we have to do is to closely analyze the situation and use the principle of ratio and proportion.

What we have to do first is to write the given values in terms or units of job / (man hour). In this case, the job refers to the number of walls that can be painted by the specified number of man and number of hours.

<span>For the 1st case:</span>

3 walls / (10 people * 46 minutes)

 

<span>For the 2nd case:</span>

6 walls / (4 people * t)

 

Now to solve for t, we equate the two cases:

3 walls / (10 people * 46 minutes) = 6 walls / (4 people * t)

t = (6 walls / 4 people) / [3 walls / (10 people * 46 minutes)]

t = 1.5 / (3 / 460)

t = 230 minutes

 

Therefore it requires 230 minutes for 4 people to paint 6 walls.

3 0
3 years ago
Please help? ill give brainliest too
madam [21]
The solution would be where the lines cross each other

they cross at (3,4) and (5,12)
4 0
2 years ago
Read 2 more answers
How to find the arc length (geometry)
andrew11 [14]

Answer:

94.2

Step-by-step explanation:

Arc length is basically circumference.

Circumference formula: 2πr

All we need is the radius.

Radius = r

15 x 2 = 30 (diameter)

Then we are going to multiply by pi.

Arc length = 30π OR 94.2

5 0
2 years ago
A ball is dropped out a wimdow that is 36 feet high. how long does it take for the ball to hit the ground
Readme [11.4K]
36 feet to metres = 10.97
first find the final velocity
vf^2 = vi^2 + 2ad
vf^2 = 0 + 2(9.81)(10.97)
vf^2 = 215.2314
vf = 14.6708

vf = vi + at
at = vf - vi
t = (vf - vi)/a
t = (14.6708)/9.81
t = 1.4955seconds
4 0
3 years ago
What is the value of the digit 6 in 873,261?<br> What is the value of the digit 6 in 137,2617?
Talja [164]

Answer:

Step-by-step explanation:

60  

600

7 0
2 years ago
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