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
rosijanka [135]
2 years ago
10

A gust of wind forces a rock to fall off a cliff that's 20 feet high. This is represented by the function h(t) = –16t2 + 20, whe

re t represents the time measured in seconds, and h represents height above the ground. Approximate how many seconds it takes for the rock to hit the ground.
Answer Options:

A.) 1.25 seconds

B.) 1.5 seconds

C.) 1.12 seconds

D.) 1 second
Mathematics
1 answer:
Helga [31]2 years ago
8 0

Answer: C.) 1.12 seconds

Step-by-step explanation:

Hi, to answer this question we have to substitute h=0 (when the rock hits the ground the height above it is 0) in the equation given:

h (t) = –16t2 + 20

Solving for t (time)

0= –16t2 + 20

16t2=20

t2=20/16

t=√1.25 =1.12 seconds (option C)

Feel free to ask for more if needed or if you did not understand something.

You might be interested in
Kelly spends $75.98 on items for a party. She buys thank you cards that cost $3.18 (including tax). She also buys gift bags that
vladimir2022 [97]
B. 7 because if you do $75.98/$10.40=7
6 0
3 years ago
How do I write an inequality for this graph? Dint mind the other ones just number 5
Strike441 [17]
X <-7 nnnsnsjssjjsjajajaj
4 0
2 years ago
Read 2 more answers
HOW MANY 7 DIGIT TELEPHONE NUMBERS ARE POSSIBLE IF THE FIRST DIGIT CANNOT
lyudmila [28]

Answer:

there are 8 million different phone numbers whose phone numbers whose digits aren't 0 or 1

6 0
1 year ago
How is the graph of y = 8x2 − 1 different from the graph of y = 8x2?
dezoksy [38]

Answer:

The first image = y =8x^2 -1

The second image y =8x^2

Step-by-step explanation:

3 0
3 years ago
Find the slope of the line that passes through the following points. (-2, 8) and (3, -2)​
Elodia [21]

Answer:

m=-2

Step-by-step explanation:

m=y2-y1/x2-x1

m=-2-8/3-(-2)

m=-2-8/3+2

m=-10/5

m=-2

3 0
1 year ago
Other questions:
  • The manager of the quality department for a tire manufacturing company wants to know the average tensile strength of rubber used
    12·1 answer
  • If the measure of arc AB is 45 degrees and the radius is 12 meters, what is the arc length of arc AB?
    11·1 answer
  • 0.53 x 0.67 =<br> Pls pls pls pls pls pls
    12·1 answer
  • The temperature in degrees Celsius can be expressed by the function c(f)=5/9(f-32) where f is the temperature in degrees farenhe
    7·2 answers
  • How many square feet of outdoor carpet will need for this hole
    14·1 answer
  • I need this by the end of the week so if anyone knows the. that would be helpful
    5·1 answer
  • A regular octagon is inscribed inside a circle. The perimeter of the octagon is units. A: What is the measure of a side of the o
    14·1 answer
  • A police officer recorded the speeds of 100 cars in a 50-mile-per-hour zone. The results are in the box plot shown. How many car
    8·2 answers
  • What is pie time 23.9817
    5·2 answers
  • Please ifs due today!!
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!