The answer to your question is 10 seconds. I know this because:

distance divided by speed=time
let t=time
t=2*6(30/36)=10
t=10
So, it took Boris a total of 10 seconds to run up the out of service elevator.

Hope this helps!

8 0

3 years ago

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Evaluate: 5–^2 = <br> WILL MARK AS BRAINLIEST

Elanso [62]

When you have a negative exponent, you move it to the other side of the fraction to make the exponent positive.

For example:

$x^{-2}$ or $\frac{x^{-2}}{1}=\frac{1}{x^2}$

$\frac{1}{y^{-2}}=\frac{y^2}{1}$ or y²

So:

$5^{-2}=\frac{1}{5^2}=\frac{1}{25}$

Your answer is B

4 0

3 years ago

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A moving trailer with a speed of 70km/h slows down its speed by 15% within 30 seconds. calculate the declaration of the trailer.

antoniya [11.8K]

Answer:

declaration = - 0.55 m/s²

Step-by-step explanation:

The declaration is a negative accelaration.

Therefore:

$a = \frac{v-u}{t}$

a = ?

v = 70 of 15% = 10.5 km/h to m/s = 2.9 m/s

u = 70 km/h to m/s = 19.4 m/s

t = 30 seconds

$a = \frac{2.9-19.4}{30}\\$

a = - 0.55 m/s²

7 0

3 years ago

Maryanne sells cruise vacations.

grandymaker [24]

Answer:

fcriohewdsajiodsx

Step-by-step explanation:

oing this for something! tewsting

4 0

3 years ago

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