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
Vilka [71]
3 years ago
8

Vanessa throws a tennis ball in the air. the function h(t) = -16t2 + 45t + 7 represents the distance, in feet, that the ball is

from the ground at any time t. at what time, to the nearest tenth of a second, is the ball at its maximum height? t = seconds listen submit answer previous next
Mathematics
1 answer:
antiseptic1488 [7]3 years ago
4 0
Given that height, h(t) of a tennis ball is modeled by the equation h(t)=<span>-16t^2 + 45t + 7, the time taken for the ball to reach maximum height will found as follows:
at maximum height:
h'(t)=0
but from the equation:
h'(t)=-32t+45=0
solving for t we get
t=45/32
t=1.40625~1.4 seconds
Thus the time taken to reach maximum height is 1.4 seconds


</span>
You might be interested in
A tree was 5 feet tall. One year later, the tree was 13 feet tall. Write an equation and use mental math to find how many feet f
swat32
Just minus 5 feet from the new height which is 13ft, and the equation will be 13-5, and therefore the tree grew 8 feet
7 0
3 years ago
Read 2 more answers
The sum of the digits of a certain two-digit number is 7. Reversing its digits increase the number by 9. What is the number?
Elis [28]
Let the two numbers be x and y.

According to your question;

x + y = 7
10y + x = 10x + y + 9

By equation 1 ; x = 7-y

Substituting the value of x ;

10y + ( 7 -y) = 10(7-y) + y + 9

9y + 7 = 70 -10y + y + 9

9y + 7 = 70 - 9y + 9

=> 18y = 70 -7 + 9
=> 18y = 72
=> y = 4

Substituting for x ;

x = 7 - y
=> x = 7 -4
=> x = 3

Thus, x = 3 and y = 4;
=> The number is 34.
5 0
3 years ago
Read 2 more answers
The sum of two numbers is 12 and there diffrence is 8 find the 2 numbers
zloy xaker [14]
10 and 2 :)

i hope you have a great day :)
7 0
2 years ago
Read 2 more answers
Which system of linear inequalities is represented by the
Snowcat [4.5K]

Answer:

A linear inequality graph usually uses a borderline to divide the coordinate plane into two regions. One part of the region consists of all solutions to inequality. The borderline is drawn with a dashed line representing '>' and '<' and a solid line representing '≥' and '≤'.

5 0
3 years ago
Describe the graph of the function f(x) = x3 − 11x2 + 36x − 36. Include the y-intercept, x-intercepts, and the shape of the grap
pogonyaev
The x intercepts are (2,0), (3,0) and (6,0)
The y intercept is (0,-36)
The graph is attached as an image.

5 0
3 years ago
Other questions:
  • Find the circumference of a circle with a diameter of 6 cm. Leave your answer in terms of pie
    12·1 answer
  • Help!
    12·1 answer
  • Find the median of the following set of data. Round your answer to the nearest hundredth, if necessary.
    5·1 answer
  • A straight line has equation 3y-3x=4. Write down the equation of another straight line parallel to it
    10·1 answer
  • HELP NOW!!!What is the value of x?
    13·2 answers
  • Robin buys 40 flowers to put into 5 vases. She writes that 40 is 5 times as many as 8. What other comparison sentence can she wr
    14·1 answer
  • Factor the Polynomial<br> 5x2 + 45x
    9·2 answers
  • HELP!!!!!! Exam emergency
    12·2 answers
  • ❗❗PLEASE HELP ON THESE QUESTIONS❗❗
    9·1 answer
  • Nick has a box of ornaments that he uses to
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!