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]
3 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]3 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
Here is 93 points but answer this please If x = 4, what is the value of x3 + x - 5?
Luda [366]

Answer:

11

Step-by-step explanation:

x3+x-5

3*4=12

12+4-5

16-5=11

pls i REALLY need brainliest

8 0
2 years ago
PLEASE HELP!!
olga_2 [115]

The value of a = 2.17 and b = 1.95.

<h3>What is regression line?</h3>

A regression line is a graphic representation of the regression equation expressing the hypothesized relationship between an outcome or dependent variable and one or more predictors or independent variables;

y=2.01*1.93^{x}

Correlation:

r=0.964

R-squared:

r²=0.9292

Hence, value of a and b is 2.17 and 1.95.

learn more about regression line here:

brainly.com/question/11340674

#SPJ1

8 0
2 years ago
Given the list of terms 1/3​, 1, 5/3, 7/3,.... Find the 15th and −16th term.
qwelly [4]

Answer:

15th term =29/3

16th term = 31/3

Step-by-step explanation:

Given an arithmetic sequence with the first term a1 and the common difference d , the nth (or general) term is given by an=a1+(n−1)d .

First we find the 15th term

n=15

a1=1/3

d=1 - 1/3 = 2/3

Solution

1/3+(15-1)2/3

1/3+28/3

(1+28)/3

29/3

Lets find the 16th term

1/3+(16-1)2/3

1/3+30/3

(1+30)/3

31/3

8 0
3 years ago
A pair of boots is 30dollars more than a pair of sandals. A pair of sandals cost s dollars each. Emily purchased 2 pairs of boot
babunello [35]

Answer: The expression representing the amount of money spent is 5x+60 by Emily.

Step-by-step explanation:

Since we have given that

Let the cost price of per pair of sandals be 's'

Let the cost price of per pair of  boots be 's+30'.

Number of pairs of boots = 2

Number of pairs of sandals = 3

Total cost would be

2(s+30)+3s\\\\=2s+60+3s\\\\=5s+60

Hence, the expression representing the amount of money spent is 5x+60 by Emily.

5 0
3 years ago
Please help with math
Sergio [31]

Answer: x = 2

Step-by-step explanation:

x+y=8\\y=3x

Replace y in the first equation by the value of y in the second equation.

x+y=8\\x+3x=8\\4x=8\\x=\frac{8}{4}\\ x=2

4 0
2 years ago
Read 2 more answers
Other questions:
  • Find value of x and y <br><br> 4.)2x-3y=-15<br> x=4y
    13·2 answers
  • Is this correct? if not please let me know how to solve it
    13·2 answers
  • The captain of a submarine orders the crew
    5·1 answer
  • In which quadrant does -8,-10 lie?
    9·1 answer
  • What digit is in the tenths place in this number ? 549.812
    7·1 answer
  • What is 11/9 reduced to a mixed number?? i cant figure this out
    12·2 answers
  • Maria ran 4 7/8 miles on monday she ran 2 3/8 miles on friday, how many miles did maria run altogether?
    6·2 answers
  • Write a definition of rounding in your own words???
    10·2 answers
  • Please help! I will give brainliest!
    11·2 answers
  • A glider flies 13 miles north from the airport and then 24 miles diagonally southeast. Approximately how far west does the glide
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!