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3 years ago

8

los trabajadores de una mina se encuentran a 20 metros bajo tierra .Si excavan 3 metros desde alli suben otros 8 metros para cog

er una caretilla a que altura estaba la carretilla

1 answer:

Yakvenalex [24]3 years ago

8 0

Step-by-step explanation:

la carretilla estaba a unos 15 metros de altura

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The locus of points idea allows you to define a circle without giving a numerical value for the radius?

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<span>The answer would be yes, the locus of points idea allows you to define a circle without giving a numerical value for the radius.

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3 years ago

Which represents the reflection of f(x)=sqrt x over the y axis

zloy xaker [14]

reflection of $f(x)=\sqrt{x}$ over the y axis we get $g(x)=\sqrt{-x}$

Step-by-step explanation:

We need to find the reflection of f(x)=sqrt x over the y axis

So, reflection over y- axis

If the function f(x) is transformed over y-axis then the new function g(x) will be $g(x)= f(-x)$

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3 years ago

Which of the following equations represents a line that is perpendicular to y=-4x+9 and passes through the point, (4,5)?

kap26 [50]

Answer:

$y = \frac{1}{4}x + 4 \\or\\4y = x + 16$

Step-by-step explanation:

Given equation of line is:

y = -4x+9

Comparing it with the standard form

y = mx+b

m = -4

As we know that the product of slopes of perpendicular lines is -1

Let m1 be the slope of perpendicular line

m * m1 = -1

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m1 = -1/-4

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In order to find the value of b, putting the point in standard form

5 = (1/4)*4 + b

5 = 1 + b

b = 5-1

b = 4

Putting the value of b and m1 in standard form

$y = \frac{1}{4}x + 4 \\or\\4y = x + 16$ ..

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4 years ago

A blood sample has 50,000 bacteria present. a drug fights the bacteria such that every hour the number of bacteria remaining, r(

densk [106]

Answer:

3125 bacteria

Step-by-step explanation:

Let r(0) be the initial amount of bacteria. Every hour, r(n) decreases by half. So, after one our new value for r(n) = (1/2)r(0). After two hours, r(n') = (1/2)r(n) = (1/2)(1/2)r(0) = (1/2)²r(0).

After n hours, r(n) = (1/2)ⁿr(0)

So when n = 4 hours and r(0) = 50,000, then

r(4) = (1/2)⁴r(0)

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r(4) = 3125

So, after 4 hours, we have 3125 bacteria present.

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3 years ago