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
Rzqust [24]
3 years ago
11

A boy throws a ball into the air. The equation h=−16t^2+23t+4 models the path of the ball, where h is the height (in feet) of th

e ball t seconds after it is thrown. How long is the ball in the air?
Mathematics
1 answer:
lina2011 [118]3 years ago
8 0

Answer:

0.72secs

Step-by-step explanation:

Given the height of the ball in air modeled by the equation:

h=−16t²+23t+4

Required

Total time it spent in the air

To get this we need to calculate its time at the maximum height

At the maximum height,

v = dh/dt = 0

-32t + 23 = 0

-32t = -23

t = 23/32

t = 0.72secs

<em>Hence the total time it spend in the air will be 0.72secs</em>

You might be interested in
What is the measure of
sesenic [268]

Answer: C. 84

Step-by-step explanation:

In triangles ABD y BCD:

- AD=CD

- Angle BAD = angle BCD

- BD common side

THEN the triangles are equal because they have two sides and the angle opposite the longest side respectively equal.

CBD = ABD = 42 because the triangles ABD y BCD are equal

ABC = CBD+ABD = 42+42= 84

3 0
3 years ago
Read 2 more answers
PLEASE HELP ME
stiv31 [10]
Since it's a right triangle you can use the Pythagorean theorem or Trig (Soh Cah Toa).

I'll just use the Pythagorean theorem : a² + b² = c²
a = 9
b = x
c = 18

9² + x² = 18²
81 + x² = 324
x² = 324 - 81
x² = 243
x = √(243)

factor 243 to find a perfect square

x = √(3*81)
x = 9√(3)<u />
5 0
3 years ago
The y-intercept of the line whose equation is 2x + y = 4 is -2 2 4
Ber [7]

The y intercept is the value of y when x=0.  Substituting we get

y = 4

Answer: 4

8 0
3 years ago
Read 2 more answers
What is 1,207.43% times 83.53$
Sati [7]

Answer:

1 008.56628 US$ kkkkkkkkkk

4 0
2 years ago
Read 2 more answers
Ivanna will rent a car for the weekend. She can choose one of two plans. The first plan has an initial fee of $40 and costs an a
natka813 [3]
First, let's make these two into equations.
The first plan has an initial fee of $40 and costs an additional $0.16 per mile driven.
Our equation would then be
C = 40 + 0.16m
where C is the total cost, and m is the number of miles driven.
The second plan has an initial fee of $51 and costs an additional $0.11 per mile driven.
So, the equation is
C = 51 + 0.11m
where C is the total cost, and m is the number of miles driven.
Now, your question seems to be asking for one mileage for both, equalling one cost. I would go through all the steps I've taken to try and find this for you, but it would probably take hours to type out and read. In short, I'm not entirely sure that an answer like that is possible in this situation, simply because of the large difference in the initial fee of the two plans, along with the sparse common multiples between the two mileage costs.
6 0
3 years ago
Other questions:
  • Predict the number of roses in a garden with 16 sunflowers if there are 3 sunflowers in a garden with 81 roses.
    15·2 answers
  • What is 5/7 of 7/10??????
    11·1 answer
  • Which one of these is the correct unit of measurement in finding volume?
    5·1 answer
  • Perimeter of rectangle is 48 inches area is 40 inches what are the length of the side
    10·1 answer
  • Answer the attachment.​
    10·1 answer
  • Find the slope of the line 8x – 4y = 8\ (hint: find 2 points; then use the slope formula)
    5·1 answer
  • Samantha is trying to complete the Free Throw wellness challenge. In order to earn her chip, she needs to hit 16 out of 20 free
    14·1 answer
  • Last question please help me!!!!!!!
    8·1 answer
  • I need help will mark brainlist
    5·1 answer
  • can anyone help me to get the answers please its important 5. An item marked at ₹ 340 is sold for ₹ 324. What is the discount? 6
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!