Jennifer recorded the number of chirps that crickets made every 15 seconds over a period of several weeks to see the relationship between the chirps and the
outside temperature. She recorded her results on the scatter plot below.

Based on the data in this scatterplot, what would be a good prediction of the
temperature outside if a cricket chirps 70 times in 15 seconds?
A between 90 and 100 degrees
B between 105 and 115 degrees
C between 120 and 130 degrees
D between 60 and 70 degrees​

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Bring the fraction a/a-4 to a denominator of 16-a^2