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AURORKA [14]
3 years ago
14

PLEASE HELP FOR 30 POINTS....GEOMETRY/TRIG

Mathematics
1 answer:
Advocard [28]3 years ago
5 0

Answer:

10/cot 62 degrees

Step-by-step explanation:

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14. It's finding volume. The depth of the water is the value for the height.

15. I believe it's C

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3 years ago
Joey rode his bicycle 125 yds. The diameter tire is 25 inches. How many whole revolutions did the tire make (1 yd= 36 inches) ?
laila [671]

Answer:

Step-by-step explanation:

3 0
2 years ago
A welder drops a piece of red-hot steel on the floor. The initial temperature of the steel is 2,500 degrees Fahrenheit. The ambi
sergey [27]

Answer: After 18.05 minutes, the temperature of steel becomes 100 degrees.

Step-by-step explanation:

Since we have given that

Initial temperature = 2500

At t = 0,

we get that

f(t)=Ce^{-kt}+80\\\\2500=C+80\\\\2500-80=C\\\\2420=C

After 2 minutes, the temperature of the steel is 1500 degrees.

so, it becomes,

1500=2420e^{-2k}+80\\\\1500-80=2420e^{-2k}\\\\\dfrac{1420}{2420}=e^{-2k}\\\\0.587=e^{-2k}\\\\\ln 0.587=-2k\\\\-0.533=-2k\\\\k=\dfrac{0.533}{2}\\\\k=0.266

So, We need to find the number of minutes when the temperature of steel would be 100 degrees.

So, it becomes,

100=2420e^{-0.266t}+80\\\\100-80=2420e^{-0.266t}\\\\20=2420e^{-0.266t}\\\\\dfrac{20}{2420}=e^{-0.266t}\\\\\ln \dfrac{20}{2420}=-0.266t\\\\-4.8=-0.266t\\\\t=\dfrac{4.8}{0.266}\\\\t=18.05

Hence, after 18.05 minutes, the temperature of steel becomes 100 degrees.

7 0
3 years ago
A rental company charges $15 plus $4 per hour to rent a bicycle. if margie does not want to spend more than $27 for her rental,
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4*X + 15 <= 274*X <= 12X <= 3 
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3 years ago
Eliza bought a meal that cost $12.00. She tipped the waiter 25%of that amount . How much was the tip ?
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You want to find 25% of $12. 25% also equals 1/4. 1/4 of 12 (or 12 divided by 4) is $3.

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3 years ago
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