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
Dima020 [189]
3 years ago
5

Help me on problem 21

Biology
1 answer:
11111nata11111 [884]3 years ago
8 0
See below.


First make a diagram of the situation as shown: We are looking to find the distance RT.

The Cosine Rule states, for a triangle ABC.

a2=b2+c2−2bc⋅cos(C)

Making C=S=120∘

We have:

(RT)2=(ST)2+(RS)2−2(ST)(RS)⋅cos(S)

(RT)2=2002+1502−2(200)(150)⋅cos(120∘)

So the first one is the correct solution.

You might be interested in
What would cause an individual to have a mutation in all of their cells?
Stella [2.4K]

Answer: These changes can be caused by environmental factors such as ultraviolet radiation from the sun, or can occur if an error is made as DNA copies itself during cell division. Acquired mutations in somatic cells (cells other than sperm and egg cells) cannot be passed to the next generation.

Hope that helped

6 0
4 years ago
Read 2 more answers
Assume that the red blood cell counts of women are normally distributed with a mean of 4.577 million cells per microliter and a
postnew [5]

Answer:  C. ​82.26%

Explanation:

Given :  The red blood cell counts of women are normally distributed with

\mu=4.577\text{ million cells per microliter}

\sigma=0.382\text{ million cells per microliter}

Let X be the random variable that represents the red blood cell counts of randomly selected woman.

Z-score : z=\dfrac{X-\mu}{\sigma}

For X=4.2

z=\dfrac{4.2-4.577}{0.382}\approx-0.99

For X=5.4

z=\dfrac{5.4-4.577}{0.382}\approx2.1544

Now, the probability that the women have red blood cell counts in the normal range from 4.2 to 5.4 million cells per​ microliter will be :-

P(4.2

Hence, 82.26% of women have red blood cell counts in the normal range from 4.2 to 5.4 million cells per​ microliter.

4 0
3 years ago
In radioactive dating, scientists determine the age of a fossil by
Lorico [155]
Scientists establish the age of a rock or fossil based on natural radioactive decay and certain elements such as potassium and carbon, this is used to make reliable “clocks” to date ancient events.
(Sorry if not all is accurate hope it helps)
6 0
3 years ago
Plants absorb light energy and store that energy in the form of what
Assoli18 [71]

Answer:

Chlorophyll's job in a plant is to absorb light—usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules. Through photosynthesis, the plant uses the stored energy to convert carbon dioxide (absorbed from the air) and water into glucose, a type of sugar.

Explanation:

Hope this helps- Good luck! ^w

4 0
3 years ago
Read 2 more answers
The bone are composed of two parts which are what?
zalisa [80]

Answer:

the shaft and the bone marrow

Explanation:

A hard outer layer called cortical (compact) bone, which is strong, dense and tough. 2. A spongy inner layer called trabecular (cancellous) bone. This network of trabeculae is lighter and less dense than compact bone.

<h2>mark me brainliest please</h2>
6 0
3 years ago
Other questions:
  • As compared to babies of healthy mothers, babies whose mothers suffered from certain infections when they were pregnant were ___
    14·1 answer
  • Which of the following units would be the most appropriate for measuring the width of your hand?
    7·1 answer
  • What types of plasmids are found in prokaryotes? what significance have plasmids in medicine?
    8·1 answer
  • Incomplete Dominance and Codominance You are studying leaf development in a member of the mustard family. You identify several m
    9·1 answer
  • For the average young adult female resting in a reclined position, the heart pumps out approximately 5 liters of blood per minut
    6·1 answer
  • Genes are important in determining what you look like. what else plays an important role?
    15·2 answers
  • what does natural selection have to do with giant pandas when ANSWERING USE THE WORDS VARIATION, DNA, DARWIN I PROMISE YOU THAT
    6·1 answer
  • If a person dies, how long untill "rigormortis"?<br> (if that is how you spell it)
    15·1 answer
  • For what cellular function does the breathing rate help regulate?
    13·1 answer
  • Under conditions when there is very intense competition between memebers of the same species the distribution of individuals wil
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!