Write the product using exponents. (−9)⋅(−9)⋅(−9)⋅(−9)⋅(−9)
Answer:
Step-by-step explanation:
(-9)⁵
(-9) is appearing 5 times
Answer:
-9^5
Step-by-step explanation:
(-9)*(-9)*... is -9^5
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Climate change is a well-documented phenomenon that has occurred throughout Earth's history, including the ice ages.
Climate change is a well-documented phenomenon that has occurred throughout Earth's history. One example of climate change is the ice ages, which occurred periodically over the past half million years. During an ice age, the temperature in the Northern Hemisphere decreases, causing the growth of glaciers and ice sheets.
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Answer:
Step-by-step explanation:
Given : An 8.5 centimeter green bean pod contains peas that average 0.45 centimeter in diameter.
Then, the number of peas in the pod will
be 19 peas in the pod.
statistical analyses. The researcher administers a survey to 15 students who
are seated at the front of the laboratory. How could this study be improved?
Select all that apply.
A. Use an instrument to test statistical analysis understanding.
B. Select a random sample of students who go to the work
laboratory
c. Use a larger sample size.
D. Administer instruments to a group who does not go to the work
laboratory, as well.
Answer:
B. Select a random sample of students who go to the work laboratory
Step-by-step explanation:
The best way to get acurate results is by selecting a random sample of students. If the students administers a survey to the students that are seated at the front of the laboratory he could get biased results.
The students that are seated in fron of the laboratory could obey to a certain characteristic (ie. They could be very applied students), which could definitely provide us with a different result.
The survey is just fine. We don't need any instrument to test statistical analysis understanding. Also, using a larger sample size of students seated in front of the laboratory won't make much difference. Finally, Administering instruments to a group who does not go to the work laboratory makes no sense. You can not measure effectiveness on people that don't assist to class.
Answer:
Select a random sample of students who go to the work laboratory
verified on a p e x
The cost of one doughnut is $0.75 and the cost of one cookie is $0.60.
The allocation of weights to the important variables that produce the calculation's optimum is referred to as a direct consequence.
Alexandra buys two doughnuts and three treats at a donut shop and is charged $3.30. Brianna buys five doughnuts and two treats at a similar shop for $4.95. Every one of the doughnuts and treats has a similar cost.
Assume 'x' is the cost of doughnuts and 'y' is the cost of one cookie. Then the equations are given as,
2x + 3y = 3.30 ...1
5x + 2y = 4.95 ...2
Multiply equation 1 by 5 and equation 2 by 2, then we have
10x + 15y = 16.50 ...3
10x + 4y = 9.90 ...4
Subtraction equation 2 from equation 1, then we have
15y - 4y = 16.50 - 9.90
11y = 6.60
y = $0.60
Then the value of 'x' is given as,
2x + 3(0.60) = 3.30
2x + 1.80 = 3.30
2x = $1.50
x = $0.75
The expense of one donut is $0.75 and the expense of one treat is $0.60.
More about the solution of the equation link is given below.
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