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
WITCHER [35]
3 years ago
7

a biologist wants to determine the effect of a new fertilizer on tomato plants. what would be the control

Mathematics
2 answers:
Snowcat [4.5K]3 years ago
6 0
The control could be sunlight, water, temperature, or the type of soil, but i would have to go with a main one, the type of plant, tomato plant. hope i helped.
leonid [27]3 years ago
3 0
First, the biologist must define the variables:

Dependent- this is what will be measured. So the biologist may want to measure the weight and height of the tomatoes, or the leaf area or the time it will produce the fruit.

Independent- this is what will differ in the experiment and what the biologist thinks will affect the dependent variable. In this case, the biologist will use new fertilizer on plant A, old fertilizer on plant B, and no fertilizer on plant C.
Controlled- these variables must be held constant because the biologist doesn’t want other factors to affect the growth of the tomato plant, thus, destroying the purpose of the experiment, tomato plant A, B, and C will have equal amounts of soil, water, and carbon dioxide, and exposure to sunlight.

After his experimentation, he will conclude which of the plant has better weight, growth, leaf, and fruit. If Plant A is the best tomato plant of them all, then he can say that the new fertilizer is more effective.
You might be interested in
A town has a population of 3373 people at time t equals 0. the population increases by 6 % per year. write a formula for the pop
salantis [7]
P0 = 1000 

<span>(A) pt = 1000 + 90t ; 1000 + 90 + 90 + 90 ... </span>
<span>(B) pt = 1000 * 1.03^t ; ((10000 * 1.03) * 1.03)..</span>
6 0
3 years ago
Two vectors A⃗ and B⃗ have magnitude A = 2.93 and B = 3.00. Their vector product is A⃗ ×B⃗ = -4.95k^ + 1.94 i^. What is the angl
Klio2033 [76]

Answer:

Angle is 37.21 degree

Step-by-step explanation:

Given Data

|A|=2.93

|B|=3.00

A×B=-4.95k+1.94i

Angle=?

Solution

|A×B|=|A|×|B|Sinα

First for |A×B|

|A×B|=\sqrt{x^{2}+y^{2}  }

|A×B|=\sqrt{(-4.95)^{2}+(1.94)^{2} }

|A×B|=5.316

|A×B|=|A|×|B|Sinα

Sinα=\frac{|A*B|}{|A||B|}

Sinα=\frac{5.316}{8.79}

α=37.21 degree

4 0
3 years ago
This is an isosceles trapezoid.<br> R.<br> s<br> 75<br> X<br> Y У<br> T<br> U
LekaFEV [45]

Answer:

S=R

75+75=150

360-150=210

210/2=105

y=105

5 0
3 years ago
Read 2 more answers
In a game show, contestants gain or lose points by answering questions. Jacob began with 27 points, then he lost 53 points and g
tatuchka [14]

Answer:

His final score was -11 points

Step-by-step explanation:

27 - 53 = -26

-26 + 15 = -11

4 0
3 years ago
Find side lengths C and H
Nuetrik [128]

Answer:

\displaystyle c=\frac{2\sqrt{3}}{3}\\\\\displaystyle h=7\sqrt{2}\\

Step-by-step explanation:

<u>Right Triangles</u>

A right triangle can be identified by the fact it has an internal angle of 90°. In a right triangle, the trigonometric ratios stand.

Let's consider the triangle to the left.  We need to calculate side c, one of the legs of the triangle. We can use the angle adjacent to it (60°) or the angle opposite to it (30°) with the appropriate trigonometric ratio.

We'll use the adjacent angle, and

\displaystyle tan60^o=\frac{2}{c}

Solving for c

\displaystyle c=\frac{2}{tan60^o}=\frac{2}{\sqrt{3}}

Rationalizing

\displaystyle c=\frac{2}{\sqrt{3}}\cdot \frac{\sqrt{3}}{\sqrt{3}}=\frac{2\sqrt{3}}{3}

Now for the triangle to the right. The side h is the hypotenuse. Again, any of the two angles can be used (though they are equal, for it's an isosceles triangle). For any of them it is true that

\displaystyle sin45^o=\frac{7}{h}

Solving for h

\displaystyle h=\frac{7}{sin45^o}=\frac{7}{\frac{\sqrt{2}}{2}}=\frac{14}{\sqrt{2}}

Rationalizing

\displaystyle h=\frac{14}{\sqrt{2}}\cdot \frac{\sqrt{2}}{\sqrt{2}}=\frac{14\sqrt{2}}{2}=7\sqrt{2}

3 0
4 years ago
Other questions:
  • A store is having a 20% off sale. The sale price of an item with price p is p – 0.2p. What is an equivalent expression?
    8·2 answers
  • Zeus Industries bought a computer for $2857. It is expected to depreciate at a rate of 24% per year. What will the value of the
    13·1 answer
  • Write 16 1/2 as an improper fraction
    6·2 answers
  • Dave is driving to Gilmore to visit his friend. If he wants to stop for lunch when he is about halfway there, in which town shou
    15·2 answers
  • Describe a sequence of translations, rotations, and reflections that takes Polygon P to Polygon Q. P​
    7·1 answer
  • Click on picture to see
    14·1 answer
  • The area of a square is 8icmCalculate the perimeter of the square<br>81cm?​
    5·1 answer
  • To the nearest​ millimeter, a cell phone is 135 mm long and 48 mm wide. What is the ratio of the width to the​ length
    11·1 answer
  • What's 26% of 600, I will give brainiest
    7·1 answer
  • The sum of a number and its reciprocal is 122/11. Find the<br> number.<br> O -11<br> 09<br> O 11
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!