Allison bought jelly beans to share with her friends. She bought pounds of blueberry jelly beans and pounds of lemon jelly beans
. If she gave pounds of jelly beans away to her friends, how many pounds of jelly beans does Allison have left?
1 answer:
Answer:
Step-by-step explanation:
The complete question is provided in the attachment.
Given, Amount blueberry jelly beans= pounds
pounds.
Amount lemon jelly beans = pounds
pounds
Total jelly beans she bought = Amount blueberry jelly beans + Amount lemon jelly beans
pounds
Amount of jelly beans she gave away =
Amount of jelly beans she has left= Total jelly beans - Amount of jelly beans she gave away
=
She has left of jelly beans.
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Answer:
The smallest sample size n that will guarantee at least a 90% chance of the sample mean income being within $500 of the population mean income is 48.
Step-by-step explanation:
The complete question is:
The mean salary of people living in a certain city is $37,500 with a standard deviation of $2,103. A sample of n people will be selected at random from those living in the city. Find the smallest sample size n that will guarantee at least a 90% chance of the sample mean income being within $500 of the population mean income. Round your answer up to the next largest whole number.
Solution:
The (1 - <em>α</em>)% confidence interval for population mean is:
The margin of error for this interval is:
The critical value of <em>z</em> for 90% confidence level is:
<em>z</em> = 1.645
Compute the required sample size as follows:
Thus, the smallest sample size n that will guarantee at least a 90% chance of the sample mean income being within $500 of the population mean income is 48.
Answer:
t = 4 seconds
Step-by-step explanation:
The height of a soccer ball as a function of time is given by :
We need to find the time when the ball hit the ground i.e. h = 0
Put h = 0 in above equation. So,
It is a quadratic equation such that,
t = -1 s and t = 4 s
Neglecting -1 s, the ball will hit the ground after 4 seconds.