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devlian [24]
3 years ago
11

Dr. Tucker and his research team are interested in how aggression changes as we age. The team will recruit 100 3-year-old childr

en and assess their levels of aggression every three years until the participants turn 21. This is an example of cross-sectional research. True or false?
Mathematics
1 answer:
Rzqust [24]3 years ago
7 0

Answer:

False

Step-by-step explanation:

A cross sectional research examines changes between different population in a specific period of time. In this case the investigation of Dr. Tucker, is a longitudinal research. This research analyses changes in the same population in different periods of time which can provide data of changes of behavior of children over the time.

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katrin2010 [14]

Answer:

c) 1

Step-by-step explanation:

4 0
3 years ago
Which of the following shows the length of the third side, in inches, of the triangle below? (1 point)
GrogVix [38]

Answer:

2, sqrt of 7633

Step-by-step explanation:

for now, we'll leave the 3rd side as x

y using the Pythagorean theorem, we can conclude that (1) 48^2+x^2=73^2 or (2) 48^2+73^2=x^2.

1. If we conclude the x isn't the longest, the x would be 3025 which is the sqrt of 55, now is invalid because the 2 smallest sides can't be more than the longest side when they add up 55+48>73 so that is invalid

2. Then, it leaves us with only 1 choice left! concluding that the 3rd side is the longest. Which the answer is sqrt of 7633

6 0
2 years ago
A rock is dropped from a height of 25 feet. The function h=-16t^2 +25 gives the height h of the rock after t seconds. When does
scZoUnD [109]

Answer:

5 seconds

Step-by-step explanation:

The ground is 25 eet, so 25=-16t^2+400

-16t^2=-400, 16t^2=400

t^2=25, dividing both sides by 16

t=5 seconds.

3 0
3 years ago
Bruce rents snowmobiles to tourists.He charges $135 for 4 hours and $202.50 for 6 hours
denis-greek [22]
I think the answer is 1215
6 0
3 years ago
Read 2 more answers
The base of a pyramid has n sides. Write and expression for the number of faces of the pyramid
11111nata11111 [884]

Remark

The number of faces reaching out in the 3rd dimension of the pyramid = the number of edges on the base.

Givens

Number of edges (or sides on the base)= e

Number of faces = f

Formula

F = e + 1 Don't forget that the base is also a face.

5 0
3 years ago
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