Answer:
0.1199 = 11.99% probability that at least 5 of them did not finish the marathon
Step-by-step explanation:
For each runner, there are only two possible outcomes. Either they finished the marathon, or they did not. The probability of a runner completing the marathon is independent of any other runner. This means that the binomial probability distribution is used to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which
is the number of different combinations of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.
97.4% finished:
This means that 100 - 97.4 = 2.6% = 0.026 did not finish, which means that 
100 runners are chosen at random
This means that 
Find the probability that at least 5 of them did not finish the marathon
This is:

In which









0.1199 = 11.99% probability that at least 5 of them did not finish the marathon
Part A: Linear function
explanation:
The table for the value of the two cars with time are given as follows;
Years Car 1 Car 2
1 18,500 18,500
2 17,390 17,500
3 16,500 16,346.6
Plotting the give data, we have;
From the plot of the data, the function that can be used to describe the values of both cars after a fixed number of years is a linear function
Hope this helps a bit
Answer:
Option C
+ or - 3
Step-by-step explanation:
A quadratic equation will have equal roots if its Discriminant is equal to zero.
the discriminant in this case is 
considering the equation,

a = 9, b= 8k, c=8
Replacing the variables in the original equation with their respective values, we will have:

Note: The values of k are meant to be + or -2.12 as seen from the workings
However, these are not in the options given. the closest choice to it
is + or - 3
1.3/13(if you mean jacks queens and kings)
2.1/52
3.1/2
4.1/13
5.1/4
The height you are looking for is called the "slant height".
slant height^2 = height^2 + (half the base length)^2
slant height^2 = 62^2 + 31^2
slant height^2 = 3,844 + 961
slant height^2 = 4,805
slant height =
<span>
<span>
<span>
69.3181073025
</span>
</span>
</span>
slant height =
<span>
<span>
<span>
69.3 (rounded)</span></span></span>
Source:
http://www.1728.org/volpyrmd.htm