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
svlad2 [7]
3 years ago
5

Becky found a tennis ball outside a tennis court. She picked up the ball and threw it over the fence into

Mathematics
1 answer:
Hoochie [10]3 years ago
3 0

Answer:

31). Maximum height = 100 feet

32). Time to hit the ground = 5 seconds

Step-by-step explanation:

31). Equation modeling the height 'h' of the ball is,

     h = -16t² + 80t

     For the maximum height of the ball,

     Find the derivative of 'h' with respect to time 't' and equate it to zero.

     \frac{dh}{dt}=\frac{d}{dt}(-16t^2+80t)

          =-32t+80

     \frac{dh}{dt}=0

     -32t+80=0

     t=\frac{80}{32}

     t=2.5 seconds

     That means after 2.5 seconds ball will reach the maximum height.

     By substituting t=2.5 in the equation,

     h=-16(2.5)^2+80(2.5)

     h=100 feet

     Therefore, maximum height achieved by the ball is 100 feet.

32). If the ball follows the parabolic path,

      Time taken by the ball to reach the maximum height = Time taken by  the ball to come back to the ground from the maximum height.

      Time taken by the ball to hit the ground = 2(2.5) = 5 seconds

You might be interested in
A police officer estimated the distance from one side of a street to the other to be 14m . The actual distance was 13.4.
Oksi-84 [34.3K]
The absolute error is 0.2 and the percent error is 1.45 I hope this helps
7 0
3 years ago
Help please, I don’t know what to do..
victus00 [196]

Answer:

d. 6

Step-by-step explanation:

6 0
2 years ago
Natalie is making punch the recipe calls for 2 cups of water for every 5 scoops of powder mix. What will be the ratio be if she
AleksandrR [38]

Answer:

If she doubles it then it will be 4: 10

If she triples it then it'll be 6: 15

Hope that helps!

6 0
2 years ago
Read 2 more answers
Each month at Sea Stars, the
Tom [10]

Answer:

A good rule is to change 10 to 15 percent of the water each week. If your tank is heavily stocked, bump that up to 20 percent each week. A lightly stocked aquarium can maybe get by for two to four weeks, but this should be the maximum length of time between water changes.

Step-by-step explanation:

This is the correct answer you want

Please follow me

4 0
3 years ago
A5 inch x 7 inch photograph is placed inside a picture frame. Both the length and width of the frame are 2x inches larger
My name is Ann [436]

Answer:

8x+24

dimensions of the photograph  

length - 7 inch  

width - 5 inch

dimensions of the photo frame is 2x larger than both width and length  

length - 7 + 2x

width - 5 + 2x

the perimeter is sum of all 4 sides  

Perimeter = 2(7 + 2x) + 2(5 + 2x)

                = 14 + 4x + 10 +4x

                = 24 + 8x

correct answer is 8x+24

8 0
2 years ago
Other questions:
  • What is the domain of the relation? {(-5, -4), (-2,-1), (1,0), (2,2), (4,3)}
    14·2 answers
  • Melanies blue notebook cover is 20 centimeters by 30 centimeters. She has a sticker for each letter in her name. Each sticker is
    14·1 answer
  • PLEASE HELP ASAP IM GIVING AWAY FREE POINTS PLUS BRAINLIEST FOR CORRECT ANSWER!!!!
    5·2 answers
  • Use the quadratic formula to solve x^2-2x+2=0
    5·1 answer
  • I need help on number 1.
    15·2 answers
  • A scientist measured the wavelength of an X-ray as 0.0000000065 meters. ​ ​Write the number in scientific notation.
    5·1 answer
  • Solve for the indicated variable
    12·1 answer
  • Find the volume. need help asap!!
    12·1 answer
  • The perimeter of an equilateral triangle is 12 cm. Find the length of each side.
    13·1 answer
  • Rita ran 4 miles on Wednesday. The number of miles that Rita ran on Saturday can be represented by this expression.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!