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2 years ago

15

Mabel spends 4 hours to edit a 3 minute long video. She edits at a constant rate.How long does Mabel spend to edit a 9minute lon

g video?

1 answer:

alex41 [277]2 years ago

7 0

Answer:

12 hours

Step-by-step explanation:

If it takes Mabel 4 hours to edit a 3 minute video and she edits at a constant rate, create an equation. 3/4=9/x and x=12

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Which is equivalent to 4(x - 1)? <br>x- 4 <br>4x-1 <br>4x - 3 <br>4x - 4

ser-zykov [4K]

Answer:

4x-4

Step-by-step explanation:

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1 year ago

University officials say that at least 70% of the voting student population supports a fee increase. If the 95% confidence inter

baherus [9]

Answer:

The interval estimate is above 70%, so infer that it will be supported.

Step-by-step explanation:

The evidence that 95% confidence interval estimating the proportion of students supporting the fee increase is [0.75, 0.85] supports university officials' claim that at least 70% of the voting student population supports a fee increase.

Therefore we can infer that a fee increase will be supported.

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3 years ago

please show on graph (with x and y coordinates) state where the function x^4-36x^2 is non-negative, increasing, concave up

babunello [35]

Answer:

$y'' =12x^2 -72=0$

And solving we got:

$x=\pm \sqrt{\frac{72}{12}} =\pm \sqrt{6}$

We can find the sings of the second derivate on the following intervals:

$(-\infty$ Concave up

$x=-\sqrt{6}, y =-180$ inflection point

$(-\sqrt{6}$ Concave down

$x=\sqrt{6}, y=-180$ inflection point

$(\sqrt{6}$ Concave up

Step-by-step explanation:

For this case we have the following function:

$y= x^4 -36x^2$

We can find the first derivate and we got:

$y' = 4x^3 -72x$

In order to find the concavity we can find the second derivate and we got:

$y'' = 12x^2 -72$

We can set up this derivate equal to 0 and we got:

$y'' =12x^2 -72=0$

And solving we got:

$x=\pm \sqrt{\frac{72}{12}} =\pm \sqrt{6}$

We can find the sings of the second derivate on the following intervals:

$(-\infty$ Concave up

$x=-\sqrt{6}, y =-180$ inflection point

$(-\sqrt{6}$ Concave down

$x=\sqrt{6}, y=-180$ inflection point

$(\sqrt{6}$ Concave up

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2 years ago

It snowed 68.5 cm in one day. How much did it snow in meters?

kicyunya [14]

Answer: 0.685 meters

Step-by-step explanation:

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2 years ago

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Oliver uses the greatest common factor and distributive property to rewrite this sum: 64+96

skad [1K]

32(2+3) because 32 goes into 64 twice and 96 three times

5 0

2 years ago

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