Answer:
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Step-by-step explanation:
brainlest if helped
Answer:
the answer is option c
c)60
Step-by-step explanation:
From the given statement 2 × 3 mixed factorial design where 2 is a factor which is within the subject and
3 is the subject between the subject
then observation per cell where participants will need is 3* 20 = 60 because 3 is the factor between the subject.
For solving of the area of a square pyramid, we can use the formula below:
A=a²+2a sqrt (a²/4 +h²)
where s for the slant height, r for the a/2, where a is the side length and h for the height
Substitute the values,
A=40²+(2*40) SQRT (40²/4 +21²)
A=3920
The answer is 3920 for the area of the square pyramid.
