Rt. 78 is approximately 8.9 x 10^3 times longer than rt. 54. rt. 54 is 4.5 x 10^3 miles long. how long is rt. 78? write your answer in scientific notation.

Which system of linear inequalities is graphed? can somebody pleasssse

Find the pattern and use it to list the nth term in the sequence. 6, 12, 20, 30, 42, 56, the nth term of the sequence is

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.