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3 years ago

Which of the following is not equivalent to 1/25?

Mathematics

2 answers:

nekit [7.7K]3 years ago

8 0

The last one one, <span>5^(-2)*5^(4) = 25

25 is not equal to 1/25

Work shown below

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serious [3.7K]3 years ago

5 0

What do the up arrows mean? I may be able to help if you tell me.

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You are situated 300 feet from the base of Tower Glitz Plaza watching an external elevator descend down the side of the building

nordsb [41]

Answer:

18.66 ft/s

Step-by-step explanation:

The distance between you and the elevator is given by:

$h=\sqrt{x^2+y^2}$

The rate of change for the distance between you and the elevator is given by:

$\frac{dh}{dt}=\frac{dh}{dy}*\frac{dy}{dt}$

$-16=\frac{dh}{dy}*\frac{dy}{dt}$

$\frac{dh}{dy}=\frac{d}{dy} (\sqrt{x^2+y^2})\\$

Applying the chain rule:

$u=x^2+y^2\\\frac{dh}{dy}=\frac{d\sqrt u}{du} *\frac{du}{dy}\\\frac{dh}{dy}=\frac{1}{2\sqrt u} *2y\\\frac{dh}{dy}=\frac{y}{\sqrt {(x^2+y^2)}}$

Therefore, at x=300 and y = 500, dy/dt is:

$-16=\frac{y}{\sqrt {(x^2+y^2)}}*\frac{dy}{dt}\\-16=\frac{500}{\sqrt {(300^2+500^2)}}*\frac{dy}{dt}\\\frac{dy}{dt}=-18.66\ ft/s$

The elevator is descending at 18.66 ft/s.

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3 years ago

Which situation is an example of an observational study?

Ymorist [56]

Answer:

it finding the number of jelly beans

Step-by-step explanation:

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What is the y-intercept of 6x+ 12y= 60?

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1st one is the y Intercept is 5. get y by itself 12y=-6x+60 divide by 12.
2nd slope is -3

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A 4-cup bottle of hair gel costs $40.56. What is the price per pint?

mr Goodwill [35]

20.28$- how many pints are in a cup.. 1 pint = 2 cups

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