we know that
In an Arithmetic Sequence the difference between one term and the next is a constant

where
a1 is the first term
d is the common difference between terms
n is the number of months (in this problem)
case a) Mandy


------> equation 
in this equation the first month is April
case b) Bill


-------> equation 
In this equation the first month is May
With the equation
and the equation
calculate the attached table
therefore
the answer is
December
Answer:
yes??? what’s the question??
Step-by-step explanation:
Answer:
P-value = 0.009997
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 24
Nature of test: One-tailed test(Left tailed test)

We have to calculate the p-value.
Degree of freedom = n - 1 = 23
We calculate the p-value from the table corresponding to t score -2.50 and degree of freedom 23.
P-value = 0.009997
0.009997 is the probability of a value being to the left of a number that has a student-t statistic of –2.50.
Use double angle identity

We can relate '6x' to '3x' in the same way since 6 is 2*3.

Now sub into left side of identity. Simplify until it equals right side.
Answer:
the answer is c
Step-by-step explanation:
its the right answer lol