Answer:
D
Step-by-step explanation:
Mean tells us the average (in this case, total marks/ total number of students).
Standard deviation tells us the spread of a set of data from its mean (how much it deviates from the mean).
Thus, standard deviation can be used to determine the consistency of a data. <u>The smaller the standard deviation, the more consistent the data is</u>.
Since 4S has the smallest standard deviation of 1, it shows the most consistent achievement in the test.
Using the volume of the spherical balloon, it is found that it will take 24 hours for the balloon to become completely empty.
<h3>What is the volume of a sphere?</h3>
The volume of a sphere of radius r is given by:

Aspherical balloon has a radius of 6 feet, hence the volume is:

It has already lost 20% of it's air, and air is leaking out of the balloon at a rate of 30 cubic feet per minute, hence the volume after t minutes is given by:


It will be completely empty when:





Rounding, it will take 24 hours for the balloon to become completely empty.
More can be learned about the volume of a sphere at brainly.com/question/25608353
Answer:
real risk-free rate = 2.7 %
Step-by-step explanation:
Given data
Treasury bonds yield r = 5%
time = 5 year
(IP) = 1.9%
MRP = 0.4%
to find out
real risk-free rate r*
solution
we will find real risk-free rate r* by the given formula that is
Treasury bonds yield = real risk-free rate + IP + MRP + default risk premium + liquidity premium
so here default risk premium and liquidity premium both are zero
put all the other value we get real risk-free rate
real risk-free rate = 5% - 1.9 % - 0.4%
real risk-free rate = 2.7 %
Since david ate a quarter of the pizza he ate 3 slices. John ate 4 slices. 4+3=7 , 12-7=5 pieces of pizza are left