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pychu [463]
3 years ago
8

Erin received the following scores on her past four spelling test

Mathematics
1 answer:
Mice21 [21]3 years ago
4 0
Not sure either I need the question
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Ginny is studying a population of frogs. She determines that the population is decreasing at an average rate of 3% per year. Whe
Rama09 [41]

You can see how this works by thinking through what's going on.

 

In the first year the population declines by 3%.  So the population at the end of the first year is the starting population (1200) minus the decline: 1200 minus 3% of 1200.  3% of 1200 is the same as .03 * 1200.  So the population at the end of the first year is 1200 - .03 * 1200.  That can be written as 1200 * (1 - .03), or 1200 * 0.97

 

What about the second year?  The population starts at 1200 * 0.97.  It declines by 3% again.  But 3% of what???  The decline is based on the population at the beginning of the year, NOT based no the original population.  So the decline in the second year is 0.03 * (1200 * 0.97).  And just as in the first year, the population at the end of the second year is the population at the beginning of the second year minus the decline in the second year.  So that's 1200 * 0.97 - 0.03 * (1200 * 0.97), which is equal to 1200 * 0.97 (1 - 0.03) = 1200 * 0.97 * 0.97 = 1200 * 0.972.

 

So there's a pattern.  If you worked out the third year, you'd see that the population ends up as 1200 * 0.973, and it would keep going like that.

 

So the population after x years is 1200 * 0.97x

5 0
3 years ago
HALP Can someone explain why this is a math question
erica [24]

Answer:

If the robot has more mass, then it will take a bigger force to lift up another object. If the robot is going to lift something up, it will use its arms, and its arms have mass, and the object has a mass as well. If the robot's arms have a mass of 10kg, and the object has a mass of 12kg, it will use a certain amount of force to lift up the object using it's arms. If the the robots arms were 5kg instead, it would take less force to lift of the same object using its arms.

4 0
3 years ago
It is worth 50 points so please help
Vladimir [108]

Answer:

12 inches is the maximum length for each cloth because 60,48 and 72 are all multiples of 12.

you will have 5 pieces of blue cloth, 4 pieces of gold cloth and 6 pieces of white cloth.

4 0
3 years ago
What is the area of the parallelogram?
xeze [42]

Answer:

36 cm^2

Step-by-step explanation:

The formula for the area of a parallelogram is area = base (height). so area - 6(6). So the answer is 36 square cm.

8 0
3 years ago
Read 2 more answers
An engineer is designing a new smartphone. The company wants to keep of the weight finished product below 12 ounces. After finis
Art [367]

9514 1404 393

Answer:

  yes

Step-by-step explanation:

10 1/2 + 8×(1/6) = (10 3/6) + (1 2/6) = 11 5/6 < 12

The weight with the added screws is still below 12 ounces.

3 0
3 years ago
Read 2 more answers
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