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2 years ago

True of false The World Is Going To End SOON!!!! teacher said ask this question

2 answers:

4 0

False, global warming affects the world but in a few hundred to a thousands years the green house gases will be safe and there will be another global chill.

likoan [24]2 years ago

3 0

It cannot be proven true, or proven false, since ''soon'' implicates the future, and it is impossible to know the future. You teacher probably wants you to say something like this.<span />

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Which number is between 1/6 and 0.25?

Airida [17]

$\displaystyle \frac{1}{6} = 0.16 \\ \\ 0.16 , \boxed{0.17 ,0.18,0.19,0.20,0.21,0.22,0.23,0.24},0.25$

5 0

2 years ago

A ball is thrown vertically in the air with a velocity of 95 ft/s. The ball is at a height of 120 ft.

sattari [20]

Answer:

The ball is at a height of 120 feet after 1.8 and 4.1 seconds.

Step-by-step explanation:

The statement is incomplete. The complete statement is perhaps the following "A ball is thrown vertically in the air with a velocity of 95 ft/s. What time in seconds is the ball at a height of 120ft. Round to the nearest tenth of a second."

Since the ball is launched upwards, gravity decelerates it up to rest and moves downwards. The position of the ball can be determined as a function of time by using this expression:

$y = y_{o} + v_{o}\cdot t +\frac{1}{2}\cdot g \cdot t^{2}$

Where:

$y_{o}$ - Initial height of the ball, measured in feet.

$v_{o}$ - Initial speed of the ball, measured in feet per second.

$g$ - Gravitational constant, equal to $-32.174\,\frac{ft}{s^{2}}$ .

$t$ - Time, measured in seconds.

Given that $y_{o} = 0\,ft$ , $v_{o} = 95\,\frac{ft}{s}$ , $g = -32.174\,\frac{ft}{s^{2}}$ and $y = 120\,ft$ , the following second-order polynomial is found:

$120\,ft = 0\,ft + \left(95\,\frac{ft}{s} \right)\cdot t +\frac{1}{2}\cdot \left(-32.174\,\frac{ft}{s^{2}} \right) \cdot t^{2}$

$-16.087\cdot t^{2} + 95\cdot t -120 =0$

The roots of this polynomial are, respectively:

$t_{1} \approx 4.075\,s$ and $t_{2} \approx 1.831\,s$ .

Both roots solutions are physically reasonable, since $t_{1}$ represents the instant when the ball reaches a height of 120 ft before reaching maximum height, whereas $t_{2}$ represents the instant when the ball the same height after reaching maximum height.

In nutshell, the ball is at a height of 120 feet after 1.8 and 4.1 seconds.

8 0

2 years ago

If h=2f/m+1 , solve the equation for F. Plz SHOW WORK!!!!

MArishka [77]

H=2f/m+1
subtract one from both sides
h-1=2f/m
multiply m to both sides
m*h-1=2f
divide 2 both sides
mh-1/2=F
(the whole left side of the equation is divided by 2 i just cant do it on the computer)

7 0

2 years ago

Read 2 more answers

Sabrina is building three identical table tops. The table top measures 8 feet by 3 feet. How many square feet of wood will Sabri

polet [3.4K]

I think sabrina would need 24 table tops

3 0

2 years ago

3. What is the 9th term in the following sequence? 11, 17, 23, 29, . . . (1 point) 47 53 59 65

KatRina [158]

Since the common difference is 6, we can assume that the sequence is arithmetic, with rule
T(n)=6n+5 where T(1)=11
T(9)=6(9)+5=59

5 0