Answer:
Step-by-step explanation:
Sample standard deviation is found by steps below.
<u>Find the mean:</u>
<u>Find deviations from the mean and their squares:</u>
<u>Sum the squares:</u>
<u>Divide by N - 1 (N - number of samples):</u>
<u>Square root is the sample standard deviation:</u>
Area of rectangle =height×base
4 1/2×3 3/7=9/2×24/7=216/14=15 6/14=15 3/7
A.2sinxcosx
We know the trig identity
Sin (2a) = 2 sin a cos a
sin (2x) = 2 sin x cos x
3
x^2+9x+8=0
(x+1)(x+8)=0
x+1=0
x=-1
x+8 = 0
x=-8
solutions are -1 and -8