1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Eddi Din [679]
3 years ago
15

A projectile is fired straight up from ground level with an initial velocity of 112 ft/s. Its height, h, above the ground after

t seconds is given by h = –16t2 + 112t. What is the interval of time during which the projectile's height exceeds 192 feet?
A. 3 B. t<4
C. t>4
D. 3>t>4
Mathematics
2 answers:
arsen [322]3 years ago
7 0

Answer: 3 < t < 4

Step-by-step explanation:

Given the following information :

Initial Velocity of projectile = 112 ft/s

Height (h) above the ground after t seconds :

h = –16t2 + 112t

To calculate the time when h exceeds 192 Feets (h >192)

That is ;

-16t^2 + 112t = > 192

-16t^2 + 112t - 192 = 0

Divide through by - 16

t^2 - 7t + 12 = 0

Factorizing

t^2 - 3t - 4t + 12 =0

t(t - 3) - 4(t - 3) = 0

(t-3) = 0 or (t-4) =0

t = 3 or t=4

Therefore, t exist between 3 and 4 for height in excess of 192ft

–16(3)^2 + 112(3) = 192 feets

–16(4)^2 + 112(4) = 192 feets

3 < t < 4

valentina_108 [34]3 years ago
7 0

Answer:

3<t<4

Step-by-step explanation:

You might be interested in
A store is having a closing sale. All items in the store are 35% off. Samantha found a jacket she wants to buy with an original
laila [671]

Answer:

The final price paid by Samantha is 55.25 $

Step-by-step explanation:

In order to find out the final price of the jacket for Samantha we need to calculate how much 35% of 85 $ is and subtract the original price by it. So we have:

price of discount = 85*(35%) = 85*(35/100) = 85*(0.35) = 29.75 $

Now we can compute the final price by subtracting the original price by the price of discount. So we have:

final price = original price - price of discount = 85 - 29.75 = 55.25 $

7 0
3 years ago
Read 2 more answers
Write the decimal 486.002 in words
elixir [45]
<span>The answer is four hundred eighty-six and two thousandths.</span>
7 0
3 years ago
Find the missing side length, round to the nearest hundredth.
GREYUIT [131]

Answer:

Pythagoras theorem.

hypotenuse²=height²+base²

x²=15²+12²

x²=225+144

x²=329

x=329½

x=19.20

4 0
3 years ago
Is 0.24 greater than 0.42?
natita [175]
Nope .42 is greater, .4 is closer to 1 then .2 have a great day and hope this helps
4 0
3 years ago
Read 2 more answers
Please help extra points
gavmur [86]
The answer is a) -20 you can go and rule out d.e,f
7 0
3 years ago
Other questions:
  • A student writes the equation for a line that has a slope of -6 and passes through the point (2, –8).y -(-8) = -6(x - 2)y -(-8)
    11·2 answers
  • Multiple choice help please!!!!
    13·2 answers
  • Mm
    9·1 answer
  • Miguel volunteers at a library. He needs to arrange 576 books on shelves for a book sale. There are 16 empty shelves. Miguel put
    8·1 answer
  • Help me please. I really need it​
    9·2 answers
  • What Equation Describes the Hanger?
    12·2 answers
  • What is the number if 50% of 25% of the number is 96
    11·2 answers
  • The recommended number of flowers to plant in a garden is probational to its area as shown in the table below. What is the recom
    7·1 answer
  • the point (-1,0.5) lies on the graph of f^-1(x)=2^x based on this information, which point lies on the graph of f(x)=log2x
    10·1 answer
  • Solve:<br> It just says to solve and I don’t know how
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!