Keep in mind this relationship
1. Relationship between Speed, Distance and time
→Distance = Speed × Time
2. Relationship between Displacement, Velocity and time
→Displacement = Velocity × Time
So, velocity is zero only when
Displacement= 0,so when motion is circular motion,
Total Displacement =0 because initial and final position are same.
But , Speed is not zero, because
Total Distance Traveled = 2 π × (Radius of circle).
So, Option (A)The Starting and end point are same .. . . . in which the velocity is zero but the speed is a nonzero quantity.
Answer: 20 cups of flour
Step-by-step explanation:
Answer:
A sample of 499 is needed.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of 
, and a confidence level of 
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of 
.
The margin of error is given by:
In this question, we have that:
90% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
How large a sample would be required in order to estimate the fraction of tenth graders reading at or below the eighth grade level at the 90% confidence level with an error of at most 0.03
We need a sample of n, which is found when 
. So
Rounding up
A sample of 499 is needed.
Answer:
The cost of the lessons taken
Step-by-step explanation:
Let
y -----> the total paid for the baseball bat and the lessons
c ----> the number of lessons
we have
y=25c+75
This is a linear equation in slope intercept form
y=mx+b
where
b=$75 -----> the price of he baseball bat (y-intercept)
m=25 $/lesson ----> the slope of the linear equation
therefore
25c represent the cost of the lessons taken
