Answer:
65.4% to 74.6%
Step-by-step explanation:
68% is approximately plus minus 1 standard deviations.
sigma=sqrt(n*p*(1-p))=sqrt(100*.7*.3)=4.58
so we're looking at 70+4.6 and 70-4.6.
Arc length = rθ [r = radius of the circle, θ = central angle in radians] ⇒
Standard form is a way of writing down very large or very small numbers .
= -9x^7+13x^5-6x^2
Answer:
The correct option is B.
Step-by-step explanation:
It is given that Susan drove an average speed of 30 miles per hour for the first 30 miles of a trip & then at a average speed of 60 miles/hr for the remaining 30 miles of the trip.
Time taken by Susan in first 30 miles is
Time taken by Susan in remaining 30 miles is
Total distance covered by Susan is
Total time taken by susan to complete 60 miles trip is
Susan's avg speed in miles/hr for the entire trip is
The average speed of susan for entire trip is 40. Therefore the correct option is B.