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
Mrrafil [7]
1 year ago
12

Hello,

Mathematics
2 answers:
Nookie1986 [14]1 year ago
7 0

Answer:

s = height above ground

s = 60 + 20 t - 4.9 t^2 (standard physics equation on earth)

at t = 0

s = 60 (clearly :)

now when does it hit the bleak earth?

That is when s = 0

4.9 t^2 - 20 t -60 = 0

solve quadratic and use the positive t (the negative t was back before you threw it if you had thrown it from the ground)

t = 6.09 or - 2.01

use t = 6.09

now to do the last part there are two obvious ways to get t at the peak

1. look for vertex of parabola

2. look for halfway between t = -2.01 and t = 6.09

I will do it the hard (11) waay by completing the square

4.9 t^2 - 20 t = -(s-60)

t^2 - 4.08 t = -.204 s + 12.2

t^2 - 4.08 t +2.04^2 = -.204 s +12.2 + 4.16

(t-2.04)^2 = -.204(s-80.2)

so

top at 80.2 meters at t = 2.04 s

===============

quick check on time

should be average of 6.09 and -2.01

=4.08 /2 = 2.04 check

valina [46]1 year ago
4 0

Answer:                                                                                                                 I HOPE THAT MY ANSWER WILL HELP U        

Step-by-step explanation:

s = height above ground

s = 60 + 20 t - 4.9 t^2 (standard physics equation on earth)

at t = 0

s = 60 (clearly :)

now when does it hit the bleak earth?

That is when s = 0

4.9 t^2 - 20 t -60 = 0

solve quadratic and use the positive t (the negative t was back before you threw it if you had thrown it from the ground)

t = 6.09 or - 2.01

use t = 6.09

now to do the last part there are two obvious ways to get t at the peak

1. look for vertex of parabola

2. look for halfway between t = -2.01 and t = 6.09

I will do it the hard (11) waay by completing the square

4.9 t^2 - 20 t = -(s-60)

t^2 - 4.08 t = -.204 s + 12.2

t^2 - 4.08 t +2.04^2 = -.204 s +12.2 + 4.16

(t-2.04)^2 = -.204(s-80.2)

so

top at 80.2 meters at t = 2.04 s

===============

quick check on time

should be average of 6.09 and -2.01

=4.08 /2 = 2.04 check

You might be interested in
What is the volume of a sphere with a radius of 3 inches?
Contact [7]

Answer:

36


Step-by-step explanation:


4 0
2 years ago
Read 2 more answers
Use decimals to give the ordered pair for point U. Remember to putyour odered pairs in parenthesis.
Gnoma [55]

Answer:

(0,2.5)

Step-by-step explanation:

3 0
3 years ago
write the equation of a line that is parallel to the line described by x-4y=8. Explain how you know the lines are parallel. Plz
Gnoma [55]
If the lines have the same slope but different y-intercepts, then the lines are parallel.
8 0
3 years ago
Read 2 more answers
3x3x3x11x11x__? = 16 335
kodGreya [7K]
Let the unknown number be y;

3×3×3×11×11×y = 16335;
3267×y = 16335;
y = 16335/3267;
y = 5;
5 0
3 years ago
Read 2 more answers
Find all the factors of 45
scoundrel [369]

Answer:

So, the factors of 45 are 1, 3, 5, 9, 15 and 45.

Common Factors.

Prime Numbers.

Highest Common Factor.

Step-by-step explanation:

45 is a composite number. 45 = 1 x 45, 3 x 15, or 5 x 9. Factors of 45: 1, 3, 5, 9, 15, 45. Prime factorization: 45 = 3 x 3 x 5, which can also be written 45 = 3² x 5.

8 0
2 years ago
Other questions:
  • I'm so stuck on this question please help me
    8·2 answers
  • A number expressible in the form a/b where a and b are integers
    14·1 answer
  • Make x the subject of the formula y=ax
    9·1 answer
  • There are 4 colas, 1 ginger ale, 7 root beers, and 6 cherry sodas in a cooler. What are the odds of choosing a root beer?
    12·2 answers
  • The quadratic function modeling the height of a ball over time is symmetric about the line , where t is time in seconds. Which s
    6·1 answer
  • PLEASE HELP ME ; w ;
    7·2 answers
  • I WILL MARK YOU BRAINLIEST!!
    5·2 answers
  • Bob is buying the soccer team snacks after their game today. 8 players want cookies and 5 players want ice cream cones. If ice c
    14·1 answer
  • Give a real-life situation for the sum. (will mark brainiest!!)
    6·1 answer
  • Find the midsegment of the triangle which is parallel to CA.​
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!