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2 years ago

7

Petra jogs 4 miles in 36 minutes. At this rate, how long would it take her to jog 10 miles?

2 answers:

Nataly [62]2 years ago

7 0

90 minutes or 1 hour and 30 minutes.

Hope this helps,

kwrob

DerKrebs [107]2 years ago

3 0

It would take her 90min or 1h and 30min to jog 10 miles.
Hope This Helps!

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The radius of one sphere is twice as great as the radius of a second sphere. Find the ratio of their volumes.

Juliette [100K]

The ratio of the radii is 2:1, so the ratio of their surface areas is 4:1. <span>The area of a sphere is defined by 4 * pi * r^2 </span>

<span>So if the radius of the first sphere is 2r, then it would be (2r)^2 = 4r^2 </span>

<span>The rest is the same. So the ratio of their surface areas would be </span>

<span>4 * pi * 4r^2 divided by </span>
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<span>or 4.</span>

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Pls help me in this i really need help :( :)

Andrews [41]

Hello and Good Morning/Afternoon:

<u>Let's take this problem step-by-step:</u>

<u>First off, let's write the line in point-slope form:</u>

$\rm \hookrightarrow (y-y_0)=m(x-x_0)$

(x₀, y₀) any random point on the line
'm' is the value of the slope

<u>Let's calculate the slope:</u>

$\rm \hookrightarrow Slope = \frac{y_2-y_1}{x_2-x_1}$

(x₁, y₁): any random point on the line ⇒ (-2, -6)
(x₂,y₂): any random point on the line that is not (x₁, y₁) ⇒ (2, -3)

$\rm \hookrightarrow slope = \frac{-3--6}{2--2} =\frac{3}{4}$

<u>Now that we found the slope, let's put it into the point-slope form</u>

⇒ we need (x₀, y₀) ⇒ let's use (2,-3)

$(y-(-3))=\frac{3}{4} (x-2)\\y+3=\frac{3}{4} (x-2)$

<u>The equation, however, could also be put into 'slope-intercept form'</u>

⇒ gotten by isolating the 'y' variable to the left

$y = \frac{3}{4}x-\frac{9}{2}$

<u>Answer:</u> $y = \frac{3}{4}x-\frac{9}{2}$ or $y+3=\frac{3}{4} (x-2)$

*<em>Either equations work, put the one that you are the most familiar with</em>

Hope that helps!

#LearnwithBrainly

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