Step-by-step explanat
what is the answer help im having a mental breakdown
Two students are comparing scientific experiments to investigations. They came up with the following ideas.
Student A: Testing plant growth in different types of soils
Student B: Comparing the water level in a lake during different times of the year Which student gave an example of a scientific experiment? (5 points)
A: Student A because it requires experimental and control groups
B; Student B because it requires a hypothesis
C: Student A because it is preferably done in natural settings
D: Student B because it is preferably done across a long period of time
Answer:
A is the correct answer.
Step-by-step explanation:
In experiment we require a controlled variable which is the constant in example A that is the plant we intend to put into the soil. In example B there's no such thing as controlled variable, so we can't expect the position of the water level. the water level is so unpredictable since tides or tsunami might change the result.
Answer:
A
Step-by-step explanation:
Scientific experiments need to have an independent and a dependent variable. Scientists can manipulate the independent variable. A should be the correct answer because it mentions what I just said. All scientific experiments need to have a control and experimental group. Therefore, student A and the answer A are correct.
I wish you the best of luck :D
Using a pulley system, a crew does 7,500 J of work to load a box that requires 4,500 J of work. What is the efficiency of the pulley system?
Answer:
3,000
Step-by-step explanation:
Dont need the math just the answers!
Tell whether ratios form a propotion
1/4; 3/12
54/10; 81/15
18/24; 15/20
someone help me pls:(
Answer: Ratios form a proportion if they are equal when cross-multiplied.
1/4 and 3/12
Cross-multiply these ratios to compare them: 1/4 * 12 = 3, 3/12 * 4 = 3.
So they are equal and form a proportion.
54/10; 81/15
Cross-multiply these ratios to compare them: 54/10 * 15 = 81, 81/15 * 10 = 54.
So they are equal and form a proportion.
18/24; 15/20
Cross-multiply these ratios to compare them: 18/24 * 20 = 15, 15/20 * 24 = 18.
So they are equal and form a proportion.
Hence, all the ratios mentioned above form a proportion.
Step-by-step explanation:
Please help me will give brainliest
The man is 6 feet tall. His shadow is 14 feet long. The tree's shadow is 49 feet long. Find the tree's height.
Answer:
21 ft
Step-by-step explanation:
Answer:
21 feet
Step-by-step explanation:
The double dot plot shows the number of points scored by Sam and Daniel in 15 games. What is the difference between their medians?
Answer:
4.9
Step-by-step explanation:
− 4 = − 3
Change the equation above into y=mx+b form
Answer:
y=-4x+-3
Step-by-step explanation:
Garth sells baseball caps outside the stadium. The graph shows the number of caps sold and the income from the sales. It represents a linear function.
Which statement best describes Garth's income from selling these caps?
A. He gets $5.00 per cap.
B. He gets $25.00 per cap.
C. He gets $34.00 per cap.
D. He gets $12.00 per cap.
Plz help and explain I’ll give brainliest!
Answer:
#1 32 pounds
#2 10.67 pounds
Step-by-step explanation:
#1
25% is 1/4 of the puppy
and 100% is 4/4
so you have to do 8 x 4 = 32 pounds
#2
75% is 3/4 of the puppy adult size
8 x 100/ 75
8x4/3
32/3
10.67 pounds
1) Label the axes with the correct variables. Write a title for the graph. Write appropriate labels
for each axis.
2) Plot the data pairs on the coordinate plane.
3) What is the scale for the x-axis? ____________________
4) What is the scale for the y-axis? ____________________
Answer:
4 and 6
Step-by-step explanation:
The y-coordinate of the vertex of the function y = 2x^2-8x+c is 2. The value of c is...
No Links please
PLEASE HELP ME I DON’T GET IT
Answer:
D) -5 1/4
Step-by-step explanation:
In this problem there is -3/4 foot change every year and you are trying to see how much changes over 7 years. That means you are multiply the 7 by -3/4. To do that you need to change the 7 into a fraction.
7= 7/1, now you are going to mulitpy the two fractions.
This line represents the numerators: 7 times -3= -21
This line represents the denominators: 1 times 4 = 4
Now that we know our fraction is -21/4 we simplify.
The simplest form you can get is -5 1/4.
I hope this helped, let me know if you have any questions!! :)
Please help meh no links and please give the right answer.
3. Tommy wraps sandwiches in a deli. A 12-inch sandwich takes 223 feet of paper to wrap. A 6-inch sandwich takes 113feet of paper to wrap. How much paper does Tommy use if he wraps one 12-inch sandwich and three 6-inch sandwiches?
Answer:
562 feet of paper
Step-by-step explanation:
multiply 113 by 3 and thats the amount of paper Tommy used to make three 6 inch sandwiches, then add 223. And thats the answer.
Drag the correct steps into order to solve the equation −4+12=−4 for x
Answer:
Step 1: 4x = -16
Step 2: x = -4
Step-by-step explanation:
Subtracting 12 on both sides, and dividing by 4 will isolate "x" to solve the two-step equations, as we are performing opposite operations to the variable "x".
Diana rolls a regular dice, what is the chance that she will roll a 4?
Answer: 1/6
Explanation: There are six sides on a regular dice, and only one of the sides has a four.
Find the value of x. (6x + 4)(5x + 2)(12x-4)°
Please please please help me
Answer:
Step-by-step explanation:
Since all the answers are 100s I assume the sizes are 10, 10 and 20.
This would mean there are 2 sides of 10x10 and 4 of 10x20
The total area would be 2*100+4*200=1000. Since that's obviously not one of the answers. We can assume it's probably 15 since it should give us a full 100 number. We know the other two are probably 10 due to their sizes and them obviously being two digits. This would mean it would be 2*100+4*150=800
Answer: 800?
Step-by-step explanation:
On Monday, it snowed 30 inches in 16 hours. On Thursday, it snowed 21 inches in 6 hours. On which day did it snow at a greater rate each hour? How much more per hour?
Answer:
It snowed more on thursday because
Step-by-step explanation:
you just basically divide 30 by 16 30/16 = 1.9 (simplified)
Then you divide 21 by 6 21/6 = 3.5
Answer/ Explanation:
It snowed more on thursday because when you divide 30 by 16 you get 1.9 inches an hour, then I divided 21 by 6 you get 3.5 inches of snow an hour. So therefore on thursday it snowed more every hour.
(I don't care if you use my words for the explanation)
The rate of snow deposition on Thursday is 1.625 inches per hour more than that on Monday.
What is the rate of change?Rate of change is defined as the change in value with rest to the time is called rate of change.
here,
The rate of snow deposition is given as,
Rate = amount of snow/time
On Monday, it snowed 30 inches in 16 hours.
Rate = 30 / 16 = 1.875 inch per hour
On Thursday, it snowed 21 inches in 6 hours.
Rate = 21 / 6 = 3.5 inch per hour
Difference in rate = 3.5 - 1.875
= 1.625 inches per hour
Thus, the rate of snow deposition on Thursday is 1.625 inches per hour more than that on Monday.
Learn more about the rate of change here:
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PLEASE HURRY! ITS MATH
Clare has a 1/2 liter bottle full of water. A cone-shaped paper cup has a diameter of 10cm and a slant height of 13cm as Shown. Can she pour all the water into one paper cup, or will it overflow? Explain your reasoning
(The volume of the cone is 1/3πr^2 and 1/2 liter = 500 cubic centimeters.)
To make iced coffee, Sara puts her hot coffee into a refrigerator when it’s temperature is at 130 ℉ . The temperature of the coffee drops 4 ½ ℉ each hour. What is the temperature of the coffee after 5 hours?
PLEASE HELP I’M CONFUSED
*CHALLENGE* 40 POINTS!!!
Answer:
16
Step-by-step explanation:
Daniel took 1 hour to drive from Town A, to Town B at an average speed of 70 km/h. Then he took 2 hours to drive from Town B to Town C at an average speed of 64 km/h. (a) Find the total distance traveled.
Please put the units after the answer.
(b) Find the average speed for the trip.
Math (proportions)… help :’)
A four-part spinner is spun once.
spinner with four parts labeled W, X, Y, and Z
List the sample space for the experiment.
S = {X, Y, Z}
S = {W, Z, Z}
S = {W, Y, Y, Z}
S = {W, X, Y, Z}
Answer:
the probability of each letter to be chosen is 1/4%.
S= {W, X, Y, Z}
Step-by-step explanation:
I am in need of assistance
Answer:
15
Step-by-step explanation:
A basketball player made 40 out of 50 free throws in last week's games.
a) Find the player's free-throw
percentage. (I believe it's 80%)
b) If the player averages eight free throws
per game, how many of them should she expect to make?
Answer:
a) The player's free-throw percentage is 80%
b) If the player averages 8 free throws per game, she should expect to successfully make 6.4 or about 6.
Step-by-step explanation:
Make the percent (80%) a fraction, 80/100.
Since the total amount of throws she makes is 8, put 8 as the denominator (bottom of the fraction) and an x as the numerator (top of the fraction) since the amount of throws she will make is unknown.
Because 80/100 is her free throw percentage, it should be consistent with the 8 she throws each game. Due to that, the x/8 is equal to the 80/100.
With the equation 80/100 = x/8, multiply diaganolly and you should get 640/100x.
When you divide that, you get 6 40/100 or 6.4 free throws made per every 8 throws. Because you can't make 0.4 of a throw, you round therefore making it 6.
I hope this helps!!! :)
a) To find the player's free-throw percentage, divide the number of successful free throws (40) by the total number of attempted free throws (50) and multiply by 100.
Free-throw percentage = (Successful free throws / Total attempted free throws) * 100
= (40 / 50) * 100
= 0.8 * 100
= 80%
Therefore, the player's free-throw percentage is 80%.
b) If the player averages eight free throws per game, we can use the free-throw percentage to determine the expected number of successful free throws.
Expected successful free throws = (Free-throw percentage / 100) * Number of attempts
Number of attempts = 8 (since the player averages eight free throws per game)
Expected successful free throws = (80 / 100) * 8
= 0.8 * 8
= 6.4
Therefore, the player should expect to make approximately 6 to 7 free throws per game.
To know more about percentage here
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Math probability
Can you tell me how you got the answer please hurry
14m + 5i - 6s + 7s - 8i + 11s - 9s - 4i + 10p - 3p + 5i
There are (fill in the blank) total terms in the expression above.
Answer: What type of problem is this lol
Step-by-step explanation: