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Ratling [72]
3 years ago
13

Find a unit vector parallel to and normal to the graph of f(x) at the indicated point. f(x) = sqrt(25-x^2) point (3,4)

Mathematics
1 answer:
cupoosta [38]3 years ago
4 0
<span>y = sqrt(25-x^2) at point (3,4)

The derivative gives us the slope at 3 to be:
          -2x
 ------------ at x=3: -3/4
     2sqrt(25-x^2)

</span><span>so we have a vector that is parallel to the slope of the tangent line is: <4,-3>
</span>
<span>the mag = 5 so; unit tangent = <4/5 , -3/5>
</span>
<span>since perpendicular lines have a -1 product between slopes we get the normal to be... <3/5,4/5>
</span>
<span>It is <4,-3> because it is rise over run. Rise is y component of vector and run is x component of vector.</span>
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Kool-aide is made from flavored powder and water, with the ratio of powder to water 3:2 based on weight. If 120g of flavored pow
MAXImum [283]

The given ratio of powder to water is 3:2 based on weight for Kool-aide. It is also given that 120g of flavored powder is needed for a certain amount of Kool-aide.

Let us assume that the amount of water (by weight) required to maintain the given ratio of 3:2 be represented by the letter x. Thus, from the given information we can conclude that:

\frac{Powder Weight}{Water Weight}=\frac{3}{2}=\frac{120}{x}

\therefore \frac{3}{2}=\frac{120}{x}

Cross-multiplying we get:

3x=240

\therefore x=\frac{240}{3}=80 grams.

Thus, the amount of water in grams in that Kool-aide is 80 grams.

5 0
3 years ago
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Simplify and write the trigonometric expression in terms of sine and cosine:
asambeis [7]

Answer:

we have the expression as;

1/sin u cos u

Step-by-step explanation:

tan u = sin u/cos u

cot u = cos u/sin u

Thus;

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The lcm is sin u cos u

Thus, we have that;

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But ; sin^2 u + cos^2 u = 1

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4 0
3 years ago
A positive integer is 5 more than 23 times another. Their product is 6732. Find the two integers.
inna [77]
Another way to write this is:
x = 23y + 5
xy = 6732

Now plug in the first equation into the second:
(23y + 5)y = 6732
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Either use quadratic equation or factor:
(y - 17)(23y + 396) = 0
y = 17 or -396/23

You know you can automatically eliminate the second y because it's negative and you need the two integers to multiply to a positive number (6732).

Plug y = 17 back into either equation (second might be easier):
17x = 6732
x = 396

8 0
3 years ago
5 (42) =5 (40+2) = <br> pls help ;((((
soldi70 [24.7K]
210=210 is the answer
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2 years ago
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What are the missing numbers help me
Aleksandr-060686 [28]
You are counting by 10s so the answer is 40,50,60,70,80
the complete sequence: 10,20,30,40,50,60,70,80,90,100
7 0
3 years ago
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