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kotegsom [21]
3 years ago
14

Let a function y represent the water level in a harbor measured in meters, and let x represent the number of hours

Mathematics
1 answer:
svp [43]3 years ago
6 0

Answer:

2.2 hours

Step-by-step explanation:

The equation to graph is

4.5cos(4pi/25 x)+15

Find amplitude by subtracting min from max and dividing it by two. a=4.5

Find vertical shift k by finding the midline. Either add 4.5 to 10.5 or subtract 4.5 from 19.5. k = 15

The period is given to be 12.5. Use formula 2pi/b = period to find b. b = 4pi/25

Put the equation into graphing calculator and find what x equals when the graph is 17 (for the first time)

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How to solve -2(1-7n)-5n=34
OLEGan [10]

-2(1-7n)-5n=34

Multiply the bracket by -2

(-2)(1)=-2

(-2)(-7n)=14n

-2+14n-5n=34

-2+9n=34

Move -2 to the other side. Sign changes from -2 to +2.

-2+2+9n=34+2

9n=34+2

9n=36

Divide by 9 for both sides

9n/9=36/9

n=4

Answer: n=4

6 0
3 years ago
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What value of n solves the equation <br><br> 3n=1/81<br><br> N=___
Radda [10]

3n = 1/81; divide both sides by 3 to isolate n:


3n/3 = 1/81 divided by 3. Remember that when you divide, you use the reciprocal and multiply instead!!


n = 1/81(1/3) = 1/243. Now plug 1/243 back in for n, and 3/243 is equivalent to 1/81

7 0
3 years ago
A cylinder and its dimensions are shown. One equation for calculating the volume of a cylinder is V = Bh , where B represents th
qaws [65]

Answer:

Step-by-step explanation:

To break down the volume even more, the base of a cylinder is pi(r)^2

Instead of V=Bh use V=pi(r)^2h (it's broken down more so it's easier to understand)

So just plug in the values to make B:

B=pi(r)^2

B= pi(8.3)^2

8 0
3 years ago
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Sarah spends a total of $60. Based on the information in the table, how many people attended the craft demonstration?
____ [38]
Divide 60 by however much people was there to get your answer


Hope it works
7 0
3 years ago
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What is the volume, in cubic meters, of a cylinder with a height of 8 meters and a base radius of 9 meters, to the nearest tenth
sammy [17]
Volume of a cylinder: \pi  r^{2} h

Plug in the numbers.

\pi 9^{2} 8 = <span>2035.8
</span>
The cylinder's volume is 2035.8 m³.
5 0
4 years ago
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