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slega [8]
3 years ago
9

A creature on the moon throws a rock off a cliff. The height of the rock above the surface of the moon, in meters, t seconds aft

er it is thrown is given by h(t) = −t 2 + 8t + 10. When does the rock hit the surface of the moon?
Mathematics
1 answer:
elena-s [515]3 years ago
6 0

Answer:

9.099 seconds

Step-by-step explanation:

The rock hits the surface of the moon when is t is 0.

-t^2 + 8t + 10 = 0\\t^2 - 8t - 10 = 0

Use the quadratic formula

t = -1.099 and 9.099

Since time can't be negative, the answer is t = 9.099

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Please answer I'm giving out a thanks, follow, and a brainliest.
Sveta_85 [38]

The mode of a set of numbers is the number that occurs the most.

The numbers in this set are as follows,

26, 17, 9, 12, 18, 21, 9, 14, 18, 23, 15, 7, 20, 18, 17, and 12

26 I

17 II

9 II

12 II

18 III

21 I

14 I

23 I

15 I

7 I

20 I

The number that appears the most is 18!

So the mode of the set of numbers is 18!



3 0
3 years ago
Read 2 more answers
The ratio of books to magazines at jess house is 5:3 they are 21 magazines at jess house how many books are there?
TiliK225 [7]
First, 5/3 = 1.6
21 x 1.6 = 34.99999999
But, when I put it in a calculator, the 1.6 was repeated so:
Round 34.99999999 to 35
35 books
6 0
3 years ago
Read 2 more answers
72÷x=3.6÷0.015 what is the answer?
lapo4ka [179]

Answer:

The answer you are looking for is x = 3/10

Step-by-step explanation:

D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

72/x = 3.6/0.015 // - 3.6/0.015

72/x-(3.6/0.015) = 0

72/x-240 = 0

72*x^-1 = 240 // : 72

x^-1 = 10/3

-1 < 0

1/(x^1) = 10/3 // * x^1

1 = 10/3*x^1 // : 10/3

3/10 = x^1

x = 3/10

x = 3/10

4 0
3 years ago
Read 2 more answers
Which linear inequality is represented by the graph?
Ksju [112]

Tthe inequality that describes this graph is y ≤ 1/3x - 4/3

<h3>How to determine the linear inequality represented by the graph?</h3>

The graph that completes the question is added as an attachment

From the attached graph, we have the following points

(0, -1.3) and (3, -0.3)

The slope is calculated as:

m = (y2 - y1)/(x2 - x1)

Substitute the known values in the above equation

m = (-0.3 + 1.3)/(3 - 0)

Evaluate

m = 1/3

The equation is then calculated as:

y = m(x - x1) + y1

This gives

y = 1/3(x - 0) - 1.3

Evaluate

y = 1/3x - 4/3

From the graph, we have the following highlights:

  • The line of the graph is a closed line
  • The upper part is shaded

The first highlight above implies, the inequality can be any of ≥ and ≤

While the second highlight above implies, the inequality is ≤

Hence, the inequality that describes this graph is y ≤ 1/3x - 4/3

Read more about inequality at

brainly.com/question/24372553

#SPJ1

3 0
1 year ago
What is the correct evaluation of 4x2 - 2x + 5, when x is equal to 2?
meriva

Answer:

9

Step-by-step explanation:

  1. Rewrite the problem

4x2-2(2)+5

2. Solve the problem. Do the multiplication first and then the subtraction and addition

8-2(2)+5

8-4+5

4+5

9

The final answer is 9

3 0
3 years ago
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