1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AlladinOne [14]
3 years ago
6

Can you help? This is an AP Precalc problem

Mathematics
1 answer:
Goryan [66]3 years ago
7 0

Notice that <em>v</em> points into the third quadrant since both of its components are negative. If you want a vector to point in the same direction, it would need to have the same sign on its components. So C is the correct choice.

The factor of 1/√80 comes from normalizing the vector <em>v</em>. Its norm/magnitude is

|<em>v</em>| = √((-4)² + (-8)²) = √(16 + 64) = √80

so the unit vector that points in the same direction as <em>v</em> is simply <em>v</em> / |<em>v</em>|.

You might be interested in
A rectangular planter can hold 2,304 cubic inches of soil. The dimensions of the base of the planter are 24 inches by 12 inches.
Makovka662 [10]
Your answer should be 3) 16 inches.
3 0
3 years ago
Read 2 more answers
I need help with these three problems (college algebra)
Paraphin [41]

5. After 6 hours, the concentration is halved. After 12 hours, it will be quartered. If the original concentration is 200 nmol, a quarter is 50 nmol.

14. The population doubles after 3 hours, and a day is 24 hours. That means that the original population should be multiplied by 2^{24/3}, or 2^8. 3 million times 2^8 is 3 * 256 million, or 768 million.

15. The concentration is halved every 8 hours and the original concentration is 100 nmol. So now, how many times do you halve 100 to get to 12.5?

100/2 = 50, 50/2 = 25, 25/2 = 12.5. That's three times. 3 * 8 is 24 hours, or 1 day.

8 0
3 years ago
Read 2 more answers
Please Help - Point <br> x^3-4x&lt;-5x^2+20<br> Solve in interval notation and list the zeros
Naddika [18.5K]

hi my name is antonette Jane S pascua please help me my question thank you for your answer

4 0
3 years ago
The scale factor from S to M is 3/2 What is the scale factor from M to S
natita [175]

we conclude that if the scale factor from S to M is 3/2, then the scale factor from M to S is 2/4.

<h3></h3><h3>What is the scale factor from M to S?</h3>

Suppose we have a figure S. If we apply a stretch of scale factor K to our figure S, we can say that all the dimensions of figure S are multiplied by K.

So, if S represents the length of a bar, then after the stretch we will get a bar of length M, such that:

M = S*K

If that scale factor is 3/2, then we have the case of the problem:

M = (3/2)*S

We can isolate S in the above relation:

(2/3)*M = S

Now we have an equation (similar to the first one) that says that the scale factor from M to S is 2/3.

Then we conclude that if the scale factor from S to M is 3/2, then the scale factor from M to S is 2/4.

If you want to learn more about scale factors:

brainly.com/question/25722260

#SPJ1

3 0
1 year ago
What is the sum of the first 7 terms of the geometric series:
Fiesta28 [93]

Answer:

-15.875

Step-by-step explanation:

First, we can sum up the first 5 terms.

-8 + (-4) = -12

-12 + (-2) = -14

-14 + (-1) = -15

-15 + (-1/2) = -15.5

Next, we can find a pattern in the data. We can tell that the next number is one half of the current number. For example, -4 is one half of -8. To find the next number, we simply multiply our current number by one half. Thus, the sixth number is -1/4 and the seventh is -1/8. Adding these to our current total, we have

-15.5 - 1/4 = -15.75

-15.5 - 1/8 = -15.875 as our answer

4 0
3 years ago
Other questions:
  • In a right triangle, the hypotenuse is three inches more than twice the length of one leg. If the other leg is 12 inches, what i
    15·1 answer
  • Explain why the sum or product of rational numbers is rational; why the sum of a rational number and an irrational number is irr
    11·1 answer
  • What times blank equal 90 and a 100
    7·2 answers
  • Determine whether the function f(x) = 3x4 is even or odd.
    8·1 answer
  • Ans
    5·1 answer
  • Can u help pretty pls and fast thank you
    10·1 answer
  • HELP!!! FIRST TO ANSWER GETS BRAINIEST!!!Which of the following equations was used to graph the line shown?
    11·2 answers
  • Urgent!!!<br> What is the missing angle?
    5·2 answers
  • Plzz help fast i will do 20 points
    13·2 answers
  • Someone please help, will give branliest
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!