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krok68 [10]
3 years ago
12

Jamal is studying the temperature changes in water as he moves it from the freezer to a Bunsen burner. He finds that the tempera

ture changes happen to behave in a sinusoidal manner. So, he develops a model to determine when the temperature will be at a peak and when it will be at a valley. He finds that at t = 4 minutes, the temperature reaches a maximum of 26° above freezing, and at t = 30 minutes, the temperature reaches a minimum of 10° below freezing. Which equation BEST models this situation?
A) y = 18cos(1/26(x - 4)) + 8
B) y = 8cos(1/26<(x - 4)) + 18
C) y = 18cos(pi/26(x - 4)) + 8
D) y = 8cos(pi/26(x - 4)) + 18
Mathematics
1 answer:
Marat540 [252]3 years ago
4 0
The correct answer is c)y=18cos(pi/26(x-4))+8
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Is √6/8. rational or irrational?
Ipatiy [6.2K]
<h2>Answer:</h2>

<em>The number is </em><u><em>irrational</em></u><em>.</em>

<h2>Step-by-step explanation:</h2>

<h3>1. Convert to decimal.</h3>

\sqrt{\frac{6}{8} } =\sqrt{0.75} =0.8660254038...

<h3>2. Conclude.</h3>

<em>Since this number shows to have infinite decimal figures, it cannot be represented as the ratio of 2 integers. Hence, the number is </em><u><em>irrational</em></u><em>.</em>

<u><em>-------------------------------------------------------------------------------------------------------</em></u>

<em>Note.</em><em> In case the number expressed in the question was </em>\frac{\sqrt{6} }{8}, the answer  would still be <u><em>irrational</em></u><em>, for the same reasons explained above</em>.

<u><em>-------------------------------------------------------------------------------------------------------</em></u>

<em>Learn more about the classification of numbers here:</em>

<em>brainly.com/question/28292851</em>

<em>brainly.com/question/28292525</em>

<em>brainly.com/question/28281557</em>

<em>brainly.com/question/28262827</em>

4 0
2 years ago
Lisle bought 38 pounds of red grapes and 512 pound of green grapes how many pounds of Grapes did he buy
Svet_ta [14]

Answer:

19/24

Step-by-step explanation:

From the question we are informed that Lisle bought 3/8 pounds of red grapes and 5/12 pound of green grapes

✓3/8 pounds of red grapes and 5//12

✓First thing to do is to add the fractions

But we need " the least common denominator" because their denominator are not the same, we need to make it the same...

✓ The two denominator ( 8 and 12) are both factor of 24, therefore their "least common denominator" is 24.

✓To make 3/8 pounds of red grapes has a denominator of 24, we multiply both the denominator & numerator with factor of 3.

3/8 = (3×3)/(8×3)=9/24

✓To make 5/12 pounds of green grapes has a denominator of 24, we multiply both the denominator & numerator with factor of 2.

5/12= (5×2)/(12×2)= 10/24

✓ we can see they both have the same denominator, then we can now "add both denominators"

(9+10)=19

✓ Then place the addition of the denominators on the least common denominator.

= 19/24.

Therefore, he bought 19/24 of grapes

5 0
3 years ago
1/8 divided by ? = 1/40
Brut [27]

Answer:

It would by 1/8 divided by 5! Which will equal 1/40

Step-by-step explanation:

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3 years ago
A scientist measures the water temperature in the Gulf at Gulfport on the fifteenth of each month. Her data is shown in the tabl
andrew-mc [135]
The average rate of change between March 15 and June 15 will be given by:
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Answer: C
6 0
3 years ago
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Answer:

why did you put this question two times? lol thx for points

Step-by-step explanation:

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3 years ago
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