State police believe that 70 of the drivers traveling on a major interstate highway what is the mean and standard deviation

0.051

Step-by-step explanation:

p=70%=0.70

The standard deviation of the sampling distribution of the sample proportion is the square root of the product of p and q divided by the sample size n:

=squareroot(pq/n)

=squareroot(p(1-p)/n)

=squareroot(0.70(1-0.70)/80)

=0.051

intensity of the vector is v= √37 ≈ 6.08 units and make angle ∡α ≈ 9.46° with east direction

step-by-step explanation:

required vector is consists of the two componentsvx= 2+4=6 units   and vy= 1 unit and vx ⊥ vywe will use pythagorian theorem to find intensity of the vector vv∧2 = vx∧2 + vy∧2 => v = √vx∧2 + vy∧2 = √6∧2 + 1∧2 = √36+1 = √37 ≈ 6.08 unitsthe angle ∡α between vector and east direction we wil find with tanαtanα = 1/6 => α = arc tanα = arc 1/6 => α ≈ 9.46°

hope this

answer:

c 60% on edg