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
Licemer1 [7]
3 years ago
11

I NEED HELP PLEASE, THANKS! :)

Mathematics
1 answer:
e-lub [12.9K]3 years ago
6 0

Answer:

  2.908 s

Step-by-step explanation:

The "work" is most easily done by a graphing calculator. We only need to tell it the equation of motion.

For speeds in feet per second, the appropriate equation for vertical ballistic motion is ...

  h(t) = -16t² +v₀t +s₀

where v₀ is the initial vertical velocity in ft/s and s₀ is the initial height in feet. The vertical velocity is the vertical component of the initial velocity vector, so is (65 ft/s)(sin(44°)). We want to find t for h=0.

  0 = -16t² +65sin(44°) +4

Dividing by -16 gives ...

  0 = t^2 -2.82205t -0.2500

Using the quadratic formula, we find ...

  t ≈ (2.82205 ±√(2.82205² -4(1)(-0.25))/2 ≈ 1.41103 +√2.24099

  t ≈ 2.90802

It will take about 2.908 seconds for the discus to reach the ground.

_____

<em>Comment on the question</em>

You're apparently supposed to use the equation for ballistic motion even though we know a discus has a shape that allows it to "fly". It doesn't drop like a rock would.

You might be interested in
Which of the following sets of numbers could represent the three sides of a right<br> triangle?
sweet-ann [11.9K]

Answer:

(45,60,75)

Step-by-step explanation:

Because 45^2 + 60^2 = 75^2

                  5625 = 5625

8 0
2 years ago
What is the value of z?
OLga [1]
Answer:

z = 86

Explanation:

90 - 68 = 12
180 - 78 = 102
102 + 12 = 114
180 - 114 = 86


3 0
3 years ago
Read 2 more answers
Find a number if: 3/7 of it is 2 1/14
mina [271]

Answer:

49 7/12

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Please help me thanks please
Ludmilka [50]

Answer: 3234 cubic units

Step-by-step explanation:

Volume of cylinder: πr²h

The diameter of the cylinder is 14 units so the radius is 7 units.

Now we'll substitute.

π = 22/7

h = 21

πr²h

π × 7² × 21

22/7 × 49 × 21 = 3,234

The volume is 3,234 cubic units.

6 0
3 years ago
Which of the following best describes the number shown below?
OLEGan [10]
Irrational

the number is endless in its digits (much like pi) and thus is irrational
5 0
3 years ago
Other questions:
  • One pump can drain a pool in 8 minutes. when a second pump is also used, the pool only takes 2 minutes to drain. how long would
    7·1 answer
  • What is the difference of 5.9-2.2
    15·1 answer
  • Refer to scenario 4. assume that the profit equation is $110x1 + $150x2 what is the profit at corner point (0, 30)?
    8·1 answer
  • In a T-test, if your n=459, your DF is:<br><br> A. 459<br> B. 460<br> C. 458<br> D. A&amp;C
    8·1 answer
  • Oints Q and R are midpoints of the sides of triangle ABC.
    13·1 answer
  • Your on a roller coaster your velocity is 13 ft./s are you moving up or down what is your speed
    13·1 answer
  • Help me plz what is 341 divided by 10
    12·2 answers
  • ( Help Please )
    10·2 answers
  • What is 0.6 repeating as a fraction<br> hlp im dumb
    15·1 answer
  • 4. Tim's family just got back from a vacation. They had been traveling for 2 days, driving 11
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!