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
umka2103 [35]
3 years ago
10

A boulder falls off the top of a cliff during a storm. The cliff is 90 feet high.

Mathematics
1 answer:
andreev551 [17]3 years ago
7 0

Answer:

It will take the boulder approximately 4.28 seconds to hit the road

Step-by-step explanation:

The given height of the cliff from which the boulder falls, h = 90 feet

The equation that can be used to find the time it takes the boulder to fall is h = u·t + (1/2)·g·t²

Where;

h = The height of the cliff = 90 ft.

u = The initial velocity of the boulder = 0 m/s (The boulder is assumed to be at rest when it falls)

g - The acceleration due to gravity ≈ 9.81 m/s²

t = How long it will take for the boulder to hit the road below

Plugging in the values gives;

90 = 0 × t + (1/2)×9.81×t² = 4.905·t²

∴ t = √(90/4.905) ≈ 4.28

The time it takes the boulder to hit the road, t ≈ 4.28 seconds.

You might be interested in
(6t^4-t+1) - (6t^3-4t)
goldenfox [79]

Answer:

= 6 {t}^{4}   - 6 {t}^{3}  + 3t + 1

Step-by-step explanation:

6 {t}^{4}  - t + 1 - 6 {t}^{3}  + 4t \\  = 6 {t}^{4}   - 6 {t}^{3}  + 3t + 1

5 0
3 years ago
One factor of 7x2 + 33x – 10 is
stiv31 [10]

7x^{2} +33x-10=0

\implies 7x^{2} +35x-2x-10=0\\\implies7x(x+5)-2(x+5)=0\\\implies (7x-2)(x+5)=0

7x - 2 = 0\\\implies \boxed{\bold{x = \frac{2}{7} }}

x+5=0\\\implies \boxed{\bold{x=-5}}

6 0
3 years ago
Ummmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm help plz? :)
Daniel [21]

Answer:

1. factor

2. prime number

3. composite number

4. GCF

5. LCM

7 0
3 years ago
Need halp 12x84 - -7000
satela [25.4K]

12x84-(-7000)

1008+7000

=8008

Easy

5 0
3 years ago
Read 2 more answers
Help me pleaseeeeeeeeee​
ankoles [38]

Answer:

The diameter is related because it helps find the circumference.

5 0
3 years ago
Other questions:
  • In how many ways can a committee of size 5 be formed from 11 people? Assume that, when people are chosen for a committee, the or
    14·1 answer
  • Yoshi saved $5 each week for 23 weeks. What is the total amount of money he saved. Use an area model to solve
    13·1 answer
  • According to a recent​ study, 9.3​% of high school dropouts are​ 16- to​ 17-year-olds. In​ addition, 6.4​% of high school dropou
    6·1 answer
  • Vincenzo plotted point K in the coordinate plane below
    7·1 answer
  • PLEASE HELP !   Which of the following expressions simplifies to a negative number? Select all that apply. (-1)(-1)(-1) (-1)(-1)
    11·2 answers
  • Match the factored form
    9·1 answer
  • Which of the following statements are true? Check all that apply
    7·1 answer
  • For a party, Samantha bought eight half gallon bottles of soda. About how many cups of soda did Samantha buy?
    13·2 answers
  • AB is diameter. <br><br> ( I need help asap it’s due at 11:59 pm)
    11·1 answer
  • Store A is selling clothes for 20% off. Store B advertises low prices without needing to give sales. A coat you want is sold at
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!