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
NNADVOKAT [17]
3 years ago
11

A researcher performs an experiment to test a hypothesis that involves the nutrients niacin and retinol. She feeds one group of

laboratory rats a daily diet of precisely 125.6 units of niacin and 5,400 units of retinol. She uses two types of commercial pellet food. Food A contains 0.86 units of niacin and 30 units of retinol per gram. Food B contains 0.66 units of niacin and 40 units of retinol per gram. How many grams of each food does she feed this group of rats each day
Biology
1 answer:
julsineya [31]3 years ago
4 0

Answer:

- 100 grams of food A (x)

- 60 grams of food B (y)

Explanation:

According to this question, the group of laboratory rats are being fed a daily diet of:

- 125.6 units of niacin and 5,400 units of retinol

Let x represent the number of grams needed for food A.

Let y represent the number of grams needed for food B.

This means that:

Food A: Niacin = 0.86x, Retinol = 30x

Food B: Niacin = 0.66y, Retinol = 40y

Since there are 125.6 units of niacin fed to the rats in total, then;

0.86x (A) + 0.66y (B) = 125.6

Since there are 5400 units of retinol fed to the rats in total, then;

30x (A) + 40y (B) = 5400

Solving these two equations simultaneously using elimination method:

0.86x (A) + 0.66y (B) = 125.6 ........(eqn 1)

30x (A) + 40y (B) = 5400 ............ (eqn 2)

Multiply eqn 1 by 30 and eqn 2 by 0.86

30 × 0.86x + 0.66y = 125.6

0.86 × 30x + 40y = 5400

25.8x + 19.8y = 3768 ............ (eqn 3)

25.8x + 34.4y = 4644 ........... (eqn 4)

Subtract eqn 3 from eqn 4

14.6y = 876

Divide both sides by 14.6

y = 876/14.6

y = 60

Substitute value for y (60) into eqn 2

30x + 40y = 5400

30x + 40(60) = 5400

30x + 2400 = 5400

30x = 5400 - 2400

30x = 3000

x = 3000/30

x = 100

Therefore, she feeds the group of rats 100grams of food A (x) and 60 grams of food B (y).

You might be interested in
Which of the following best defines sustainable fishing practices?
abruzzese [7]
The correct answer of the given question above would be option C. The best option that defines sustainable fishing practices is that, harvesting practices that do not reduce the potential for future harvests. Sustainable fishing guarantees that the population of the ocean and freshwater wildlife is still present over time. Hope this answer helps.
6 0
2 years ago
Read 2 more answers
What is evapotranspiration?
11111nata11111 [884]
When water is transferred from land to atmosphere by evaporation from the soil and by transpiration plants.
6 0
2 years ago
Read 2 more answers
Viral genomes may comprise Choose one: A. double-stranded RNA. B. double-stranded DNA. C. double or single-stranded DNA or doubl
wlad13 [49]

Answer:

The correct answer is- C. double or single-stranded DNA or double or single-stranded RNA.

Explanation:

All the viruses are intracellular parasites which means they obtain their nutrition from their host. Viruses do not have cellular level of organization. They only have their nucleic acid which is surrounded by a protein coat called a capsid.

The nucleic acid in viruses can be of different types. It can be single or double-stranded DNA or single or double-stranded RNA. Their genome can be linear or circular. They inject their genetic material in their host and introduce it in the host genome. Therefore the correct answer is C.

6 0
3 years ago
When 15n-labeled aspartate is fed to animals, the 15n-label rapidly appears in many amino acids. What reactions are occurring to
malfutka [58]

Aspartate + a- keto acid >> Oxaloacetate + a amino acid

This reaction is occur because the a- keto acid in the equation can come from any amino acid, the 15 N from aspartate is rapidly transferred to other amino acids.

15N is symbol use as the isotope of nitrogen with mass number 15. comprises of 0.4 % of stable nitrogen found, so the relative abundance of each in amino acid is simply a reflection of how much is found in nature in general.

This isotopes is enrichment of the labelled amino acids was determined following a previously developed procedure comprising by determination of the spectral purity of the selected natural abundance amino acids.

To learn more about aspartate here

brainly.com/question/25735714

#SPJ4

4 0
1 year ago
Which chromosome is involved in Prader Willi and Angelman Syndrome?
shepuryov [24]

Answer:

C.

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • Describe the basic components of a tissue:
    11·1 answer
  • Disadvantage of external fertilization?
    15·1 answer
  • Without ribosomes, a cell would not produce A) lipids. B) proteins. Eliminate C) salt. D) water.
    14·2 answers
  • List and describe five things you and your classmates could do to conserve water in your school.
    10·1 answer
  • What are the three most commonly used instruments for the determination of free-living physical activity and energy expenditure?
    10·1 answer
  • How does lung volume control inspiration?
    5·2 answers
  • A physical system is best characterized as a collection of:
    7·1 answer
  • Mitosis occurs for __ cells
    6·2 answers
  • How much sunlight does the twilight zone get? none at all almost as much as the sunlight zone a lot in the summer but none in th
    15·1 answer
  • Imagine that these animals lived in a costal habitat, Due to global warming, sea level rise and the area was flooded. Which grou
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!