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
Nadya [2.5K]
2 years ago
11

A rock is dropped from a height of 100 feet. Calculate the time between when the rock was dropped and when it landed. If we choo

se "down" as positive and ignore air friction, the
function is h(t) = 16t^2 – 100.

A)t = 2.5 seconds

B)t = 6.25 seconds

C)t = 10 seconds

D)t = 12.5

Mathematics
1 answer:
Fiesta28 [93]2 years ago
6 0

Answer:

A

Step-by-step explanation:

the rock lands when it reaches height 0.

so, for what t is h(t) = 0 ?

16t² - 100 = 0

16t² = 100

now we pull the square root on both sides (we can ignore the negative solutions, as negative seconds don't make any sense in our scenario)

4t = 10

t = 10/4 = 5/2 = 2.5 seconds

so, A is correct.

You might be interested in
Factor this polynomial expression.
tankabanditka [31]

Answer:

D:  3(x + 5)(x + 5)

Step-by-step explanation:

Try multiplying the last answer choice (D); the result is 3(x^2 + 10x + 25), or

3(x + 5)(x + 5).

5 0
3 years ago
Write down an appropriate equation in order to determine x
Ulleksa [173]

Answer:

X+20° = 180°

or, X = 180°-20°

or, X = 160°

5 0
2 years ago
If f(1) = 6 and f(n) = f(n − 1) +3, then f(7) =<br> (1) 10 (2) 24 (3) 15<br> (4) 18
Juliette [100K]

Answer:

24

Step-by-step explanation:

f(n) = f(n − 1) + 3

if n = 7 => f(7) = f(7-1) + 3 = f(6) + 3

if n = 6 => f(6) = f(6-1) + 3 = f(5) + 3

if n = 5 => f(5) = f(5-1) + 3 = f(4) + 3

if n = 4 => f(4) = f(4-1) + 3 = f(3) + 3

if n = 3 => f(3) = f(3-1) + 3 = f(2) + 3

if n = 2 => f(2) = f(2-1) + 3 = f(1) + 3

if f(1) = 6 then f(2) = 9

f(3) = 12

f(4) = 15

f(5) = 18

f(6) = 21

f(7) = 24

3 0
2 years ago
The function f(x) is represented by the table below. What are the corresponding values of g(x) for the transformation g(x) = 6f(
g100num [7]

Answer:

Given: The transformation g(x) =6f(x)                  ......[1]

To find the corresponding values of g(x) for the given transformation.

At x = -7, f(x) = 8

then,

By substituting the value of f(x) = 8 in [1] we have

g(x) = 6 \cdot 8 =48

Similarly,

For x= -3 , f(x) = 3, then

By substituting the value of f(x) = 3 in [1] we have

g(x) = 6 \cdot 3 =18

For x= 0, f(x) = -1 , then

By substituting the value of f(x) = -1 in [1] we have

g(x) = 6 \cdot -1 =-6

For x= 2, f(x) = 7, then

By substituting the value of f(x) = 7 in [1] we have

g(x) = 6 \cdot 7=42

For x= 10, f(x) = 5, then

By substituting the value of f(x) = 5 in [1] we have

g(x) = 6 \cdot 5=30

Therefore ; we have the corresponding values of g(x) as shown below;

x                f(x)           g(x)

-7                8                48

-3                3                 18

0                -1               -6

2                 7                42

10                5                30

5 0
3 years ago
Read 2 more answers
These map tests give me anxiety or however you spell it
Vesnalui [34]

Answer:

Im sorry i dont know what im supposed to be answering

step-by-step explanation:

5 0
3 years ago
Other questions:
  • Hich equation correctly applies the distributive property?
    14·1 answer
  • Water samples from a particular site demonstrate a mean coliform level of 10 organisms per liter with a standard deviation of 2.
    7·2 answers
  • FOR A TEST, PLEASE HELP Two angles are supplementary if their sum is​ 180°. The larger angle measures three degrees more than tw
    11·1 answer
  • Whats the answer to 5v - 42 - 73​
    9·1 answer
  • What is the slope of a line that is parallel to the line whose equation is ax+by=c?
    11·2 answers
  • I need helpp guyssssssssssssssssssssssssss
    9·1 answer
  • Given the triangle below, what is m<br> A. 46.2<br> B. 41.40<br> C. 48.4<br> D. 38.6°
    12·1 answer
  • On a coordinate grid, point A is at (−2.0, −3.4) and point B is at (2.0, −3.4). Point B is a reflection of point A across the __
    7·2 answers
  • ME HAS CONFUSION PWEASE HELP
    11·2 answers
  • Heyyyy people how r yallz
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!