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Sladkaya [172]
4 years ago
13

1. The height of a pop fly ball over the time after the ball is hit is modeled by the

Mathematics
2 answers:
stira [4]4 years ago
7 0

Answer:

5.12 seconds to the nearest hundredth.

Step-by-step explanation:

When the ball hits the ground h = 0 so

-16t^2 + 81t + 5 = 0

t =  [ -81 +/- sqrt ((81^2 - 4 * -16 * 5)]/ (2*-16)

=  (-81 +/- sqrt 6881) / -32

= 5.12 , -0.6

So the answer is 5.123 seconds.

OLEGan [10]4 years ago
3 0

Answer:

<h2>5.123 seconds</h2>

Step-by-step explanation:

F(x) = ax2 + bx + c

For further explanation comment

<h3><u>Brain Please!</u></h3>
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What is the cirumference of a circle with a diameter of 4.1 cm
nordsb [41]

<em>Answer:</em>

<em>C = 12.88</em>

<em>Step-by-step explanation:</em>

<em>If the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm. If you know the circumference of the circle, divide it by </em><em>π</em><em> to get the diameter.</em>

<em>C = π d = π · 4.1 = </em><em>12.88</em><em>053cm </em>

Glad to help ya!!

5 0
3 years ago
When asked to write the domain for the equation y= |x - 6| + 3, Mary wrote the Domain is y &lt; 3. What mistake(s) did Mary make
castortr0y [4]

Answer:

Ok, the domain is the set of values that we can input in a function.

In this case, we have:

y = Ix - 6I + 3.

Notice that there is no restriction here, x can actually take any value, then the domain will be the set of all real numbers.

The correct domain is x, x ∈ R

Now, if we had (for example) something like:

y = Ix - 6I < 3

Now we have a restriction in the domain because we can not have y equal or larger than 3.

To find the domain, we can break the absolute value:

Ix - 6I < 3

is equivalent to:

-3 < x - 6 < 3

now let's add 6 in each side.

-3 + 6 < x - 6 + 6 < 3 + 6

3 < x < 9

That will be the domain in that case.

6 0
3 years ago
A GMC dealer believes that demand for 2005 Envoys will be normally distributed with a mean of 200 and standard deviation of 30.
irina1246 [14]

Answer:

The correct answer to the following question will be "280 units".

Step-by-step explanation:

The given values are:

Mean = 200

Standard deviation = 30

Let's ask that the supplier needs to reach 99.9% of the standard of operation. To reach this quality of operation, she has to preserve an inventory of

Now,

⇒  Mean + 3\times sigma

On putting the values, we get

⇒  200+3\times 30

⇒  200+90

⇒  290 \ units

290 units would then accomplish a level of service of 99.9%.

Half unpurchased units can indeed be purchased at $30000 i.e. no failure. If he requests 300, there will be losses on 5 products that are unsold.

Hence, ordering 280 units seems to be preferable

3 0
3 years ago
Write the equation of the line graphed below.
Alexus [3.1K]

Answer: y=-7

Step-by-step explanation: on why axis and is pallet yo x axis

4 0
3 years ago
Read 2 more answers
Find the exact circumference of a circle with diameter equal to 8 ft
lina2011 [118]
The formula for circumference is C= 2(pi)(r)^2. Because diameter is double the radius, and the diameter is 8 ft, the radius is 4 ft. So, plug that into the equation, and you get: C=2(pi)(4)^2. The answer is 32 pi ft. If the question asks for the exact answer, keep the pi as it is, but if it says to round, multiply 32 by pi and round.
6 0
4 years ago
Read 2 more answers
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