Answer:
the answer is C
Step-by-step explanation:
its making write more so yeah
Its (12x8)/2=48
the base doesn't matter in an right triangle. just use length x width and because its 3 instead of 4 angles its half
the area of the square would be 49
Answer:
The desviation is 8 4/7 or 8.571
Step-by-step explanation:
The conversion for any variable X to a standard z is
where mu is the mean and sigma de desviation
You can find the value of Z whith the tables of the accumulated probability function. The accumulated probability for the mean is 0.5 .Remenber that the accumlated probability function represent the area at the left of an abscissa. Then
0.5+0.3531=0.8531
Acording to the accumulated probability function table, a Z=1.05 has an area of 0.8531 at its left.
Now it is only solving the equation
σ=
σ=8.571
The sum is 4a+2b. Hope this helped.