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pishuonlain [190]
3 years ago
13

How do i solve this problem please explain

Mathematics
1 answer:
pshichka [43]3 years ago
3 0
10 to the power of 3 is 1000 so it would be 750 divided by 1000
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In a study published on January 31, 2011 in The Proceedings of the National Academy of Sciences, researchers randomly assigned 1
Kaylis [27]

Answer:

d.

Step-by-step explanation:

Hello!

The objective of this test is to know if aerobic exercise modifies hippocampus activity. A random sample of 120 elderly men and women was taken and divided into two groups.

Group 1: Walked around a track three times a week.

Group 2: Did a variety of less aerobic exercises, including yoga and resistance training with bands.

After a year their brains were scanned showing that group 1 had an increase of 2% in their hippocampus and group 2 showed a decrease of 1.4%

a. True, this type of observational study can be the prelude to a more formal statistical study.

b. True, the explanatory variable is "type of exercise", it's the variable that the investigator suspects influence the hippocampus volume.

c. True, the objective of this experiment is to test if there is any modification on hippocampus volume, that's why the volume of the hippocampus was measured, before and after a year of exercise.

d. False, this is an observational study, you cannot establish a causal relationship between the two variables. Just inform you that there seems to be an association. To be able to generalize the results to all elderly population you need a more formal statistical experiment to support your conclusions.

I hope it helps!

5 0
3 years ago
Help me and don't put wrong answer. 30 points.
vovangra [49]

Answer:

I believe this is a METAPHOR cause you cant really throw your voice as rope.

4 0
3 years ago
Read 2 more answers
ASAP - 15 points
Reptile [31]

Answer:

A) 2b+24x

Step-by-step explanation:

7b+3x-5b+21x

7b-5b+3x+21x

2b+3x+21x

2b+24x

8 0
3 years ago
Which are solutions of the equation 4x2 - 7x = 3x + 24? Check all that apply.
riadik2000 [5.3K]

Answer:

all work is shown and pictured

4 0
3 years ago
I will give brainiest to whoever answers correctly !! There are two parts to this question A and B
laila [671]

Answer:

Step-by-step explanation:

5 1/2%=0.024

3500 x 0.025 = 87.5

She paid 87.5$ dollars for the use of money

due date is after 6 months so

3500 times 6 = 21000

21000 times 0.025 = 525

She paid 525$ dollars on the due date

4 0
3 years ago
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