PLEASE HELP?!?!?!?!?!?!?!

a ball is thrown vertically upward from the ground with an initial velocity of 60 ft/sec. how high will the ball go?

vazorg [7]

Answer:

The ball will go to maximum height of 56.25 meters.

Step-by-step explanation:

It is given that, a ball is thrown vertically upward from the ground. Initial velocity of the ball, v = 60 ft/sec

Initial height is 0 as the ball is thrown from ground. The equation of projectile is given by :

$h(t)=-16t^2+vt+h$

h = 0

$h(t)=-16t^2+60t$ ..............(1)

We need to find the maximum height reached by the ball. For maximum height,

$\dfrac{dh(t)}{dt}=0$

$\dfrac{d(-16t^2+60t)}{dt}=0$

t = 1.875 seconds

Put the values of t in equation (1). So,

$h(t)=-16(1.875)^2+60(1.875)$

h(t) = 56.25 meters

So, the ball will go to maximum height of 56.25 meters. Hence, this is teh required solution.

3 0

2 years ago

a red ball and 4 white ball are in a box if two balls are drawn without replacement ,what is the probability of getting a red ba

BARSIC [14]

The probability is 1/5 to get a red ball in 1st draw and a white ball in 2nd draw.

Step-by-step explanation:

There are 1 red ball and 4 white balls in a box.
The total number of balls in the box = 1 red + 4 white = 5 balls.

The two balls are drawn without replacement.

Drawing the first ball :

The first draw should be a red ball.

The probability to get a red ball = No.of red balls / Total balls in the box.

We know that, No. of red balls is 1 and total balls in the box is 5.

P(red ball) = 1/5

Drawing the second ball :

The second draw should be a white ball.

The probability to get white ball = No.of white balls / Total balls in the box.

We know that,

No. of white balls is 4.

The total balls in the box after the first draw will be 4 balls.

P(white ball) = 4/4

The probability of getting a red ball on the first drawn and a white ball on the second draw = P(red ball) × P(white ball)

⇒ (1/5) × (4/4)

⇒ 4/20

⇒ 1/5

Therefore, the probability is 1/5 to get a red ball in 1st draw and a white ball in 2nd draw.

3 0

2 years ago

What is 6-2p=p+9 ?Because I don't know it

nikklg [1K]

Hey there!

Firstly, you have to $\bold{simplify}$ each of the sides of your equation
$\bold{6-2p-p+9\downarrow}$
$\bold{6+(-2p)=p+9\downarrow}$
$\rightarrow\bold{-2p+6=p+9}$
Now that you have that portion out of the way, we could move on to our second step... which is to $\bold{subtract}$ by the value of $\bold{p}$ on each of your sides
$\bold{-2p+6-p-p+9-p\downarrow}$
$\rightarrow\bold{-3p+6-9}$ (you get this because we solve the particular equation we added above)
Thirdly, you have to $\bold{subtract}$ by the number $\bold{6}$ on each of your sides
$\bold{-3p+6-6=9-6\downarrow}$
$\bold{Cancel:6-6}$ because it equals to $\bold{0}$
$\bold{Keep:9-6}$ because it brings us closer and closer to the answer of $\bold{p}$
Fourthly, we have to $\bold{divide}$ by the number $\bold{-3}$ on each of your sides
$\bold{\frac{-3p}{-3}=\frac{3}{-3}}$
$\boxed{\boxed{\bold{Answer:p=-1}}}$ $\checkmark$

Good luck on your assignment and enjoy your day!

~ $\frak{LoveYourselfFirst:)}$

8 0

3 years ago

Of the following options, what could be a possible first step in solving the equation −7x − 5 = x + 3?

ANEK [815]

Your answer would be

A. Adding 7x to both sides of the equation

And in doing so, you'd start your first step to having "like terms" on "like sides"
by having all "x's" on the right side of your equivalent sign "="

5 0

2 years ago

Read 2 more answers

Are the ratios of the number of people to the number of rollercoaster cars in a proportional relationship? Explain your reasonin

LiRa [457]

Answer:

the answer will be 366:81

Step-by-step explanation:

you will find value of ratio 3:18

=6

then divide 366:61

=6

7 0

3 years ago