Answer:
your friend is corrcet
Step-by-step explanation:
The left side 0.75 is less than the right side 0.83, which means that the given statement is always true.
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100 is the best sample size
According to sources, the most probable answer to this query is 100 samples. Sample size determine the amount of subjects needed for the study to have an intended effect
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67.5 square feet
Working
A = 1/2*base*height
A = 1/2*15*9
A = 67.5 sq. feet
To determine the solution of the given equation, we can use the quadratic formula which is expressed as:
x = (-b +/- √b^2 - 4ac ) / 2a
where a, b and c are the coefficients of the equation ( ax^2 + bx + c = 0)
USing the formula above we obtain the values:
x = 21
x = 3/4
Hope this answers the question. Have a nice day.