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3 years ago

Geometry math question

Mathematics

2 answers:

aliina [53]3 years ago

8 0

By similar triangles ( triangles AFE and ADB are similar)

BD = 1/2 * FE so BD = 11.75 answer

KIM [24]3 years ago

5 0

By similar triangles ( triangles AFE and ADB are similar)

BD = 1/2 * FE so BD = 11.75 answer

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If a cup of coffee has temperature 97Â°C in a room where the ambient air temperature is 25Â°C, then, according to Newton's Law o

FinnZ [79.3K]

Answer:

The average temperature is $T_{a} = 81.95^oC$

Step-by-step explanation:

From the question we are told that

The temperature of the coffee after time t is $T(t) = 25 + 72 e^{[-\frac{t}{45} ]}$

Now the average temperature during the first 22 minutes i.e fro $0 \to 22$ minutes is mathematically evaluated as

$T_{a} = \frac{1}{22-0} \int\limits^{22}_{0} {25 +72 e^{[-\frac{t}{45} ]}} \, dx$

$T_{a} = \frac{1}{22} [25 t + 72 [\frac{e^{[-\frac{t}{45} ]}}{-\frac{1}{45} } ] ] \left| 22} \atop {0}} \right.$

$T_{a} = \frac{1}{22} [25 t - 3240e^{[-\frac{t}{45} ]} ] \left | 45} \atop {{0}} \right.$

$T_{a} = \frac{1}{22} [25 (22) - 3240e^{[-\frac{22}{45} ]} - (- 3240e^{0} )]$

$T_{a} = \frac{1}{22} [550 - 1987.12 + 3240]$

$T_{a} = 81.95^oC$

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3 years ago

I needdd hELLPPPP!! PLEASE HURRY

eimsori [14]

Answer:

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Step-by-step explanation:

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3 years ago

Find the amount A accumulated after investing a principal P= $2,000 for t= 8 years at an interest rate r= 6% compounded monthly.

Ierofanga [76]

Answer:

A = 3228.2854

I = 1228.2854

Step-by-step explanation:

1 . Use the CI formula. (Reference in file.)

2. Solve equation after plugging the given information we have.

3. We will have the Amount after solving the equation.

4. To find interest we use formula A=P+I

Source - TutorEye

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3 years ago

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expeople1 [14]

Answer:

little blurry but i think its 3

Step-by-step explanation:

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3 years ago

Jen borrowed $1500 from her parents for car repairs she plans to take 10% of her 450$ weekly income to pay them back at this rat

wolverine [178]

1500/45= about 33.33 weeks.

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3 years ago