Remember that anything to the power of 0 is 1.
7k^-2* 5(1)
7k^-2* 5
Multiply the two terms together
35k^-2
Since k has a negative exponent, simplify
k^-2= 1/k^2
Then multiply this by 35, which is the coefficient of the term
1/k^2 * 35/1= 35/k^2
Final answer: 35/k^2