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Nady [450]
3 years ago
12

the height of a football in the air t seconds after it is thrown can be modeled by the function y=-16t^2+96t+3, where y are meas

ured in feet and t is time. What is the maximum height that the football reaches? How long did it take the football to reach the maximum height? At what times will the football be above the ground at 122 feet?
Mathematics
1 answer:
Flauer [41]3 years ago
6 0
Since the function is a parabola, the maximum height would be the y-coordinate of the vertex. The x-coordinate of the vertex in standard parabolic form is
x = -b/2a.
In the problem, t would now be x.
t = -96/(2*-16) = 3*

Now that you have the time as 3 at the vertex, you can determine the height y at the vertex by substituting it in.
y = -16(3)^2 + 96(3) + 3
y = 147*

If they give you 122 feet and you need to find the time, then just plug that as y and solve for t.
122 = -16t^2 + 96t + 3
0 = -16t^2 + 96t - 119
t = 17/4, 7/4*

*Brainliest answer is always appreciated

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You have invested in three different stocks: Engineering Aces, Upton Clothiers, and Thompson Musical Instruments. Because you ha
Serga [27]

Answer:

answer is 0.001254.

Step-by-step explanation:

Given that you invested in 3 stocks of Engineering Aces, Upton Clothiers, and Thompson Musical Instruments.

Also given that each stock value is independent of the other.

Let E be the event changing in value by more than 10% in a given week for Engineering Aces,

U be the event changing in value by more than 10% in a given week for Upton Clothiers, and T be the event changing in value by more than 10% in a given week for Thompson Musical Instruments.

Given that P(E) =  = 19%

P(U) = 11%

P(T) = 6%

probability that all three will change by more than 10% in the same week

= P(EUT)

= P(E) P(U) P(T) since three events are independent.

=0.19(0.11)0.06

= 0.001254



8 0
3 years ago
Can someone plz help me on this plz I beg u plz
JulsSmile [24]
<h3>Answer:  25w+200 > 750</h3>

==========================================================

Explanation:

He starts off with 200 cards. Then he adds on 25w more cards for each week (w). Overall, he'll have 200+25w cards

We can think of it like this:

  • After 1 week, he adds on 25*1 = 25 cards
  • After 2 weeks, he adds on 25*2 = 50 cards total
  • After 3 weeks, he adds on 25*3 = 75 cards total
  • After 4 weeks, he adds on 25*4 = 100 cards total, and so on.
  • After w weeks, he adds on 25w cards total

So that's another way to see where the 25w comes from.

The expression 200+25w is the same as 25w+200. This is because we can add two numbers in any order.

------------

Since he wants to know when he'll have more than 750 cards, this means we set 25w+200 greater than 750.

That's how we get to the answer of 25w+200 > 750

Notice how there isn't a line under the inequality sign. We aren't using the "greater than or equal to" symbol here. We want to know when the cards gets over 750, but we don't want to know when it's equal to 750.

5 0
3 years ago
A store buys purses for $24.50 and then marks them up 25%. The store then discounts any purses that do not sell in the first mon
Sergeu [11.5K]

Answer:$27,57

1)find out how much wallets cost in the first month:

24,50 -100%

х      - 125%

х= 24,50*125/100 ≈ 30,63

2)we will find out how much the wallets cost after the price is reduced by 10%:

30,63 - 100%

х         -90%

х=30,63*90/100 ≈ 27,57

Step-by-step explanation:

3 0
3 years ago
What’s that precent 250 of 275
tester [92]

Answer:

Percent 250 of 275 is 90.9%

Step-by-step explanation:

We have to find 250 is what percent of 275.

Let X be the percentage, then

=> X =  \frac{250}{275} \times 100

Now simplyfying the above relation we get

=> X =  0.909\times 100

=> => X = 90.9 %

Hence 250 is 90.9% of 275

5 0
3 years ago
Which expressions are equivalen] to x^3 + 9x^2 ?
Minchanka [31]

Answer:3a. Stu ?

Step-by-step explanation:

4 0
2 years ago
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