How is it important to know how to change a fraction into a decimal? Please I need help!

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

The length of the largest fish is 967.74 times greater than the length of the smallest fish. select a variable expression that shows the length of the largest fish, if 8 is the length of the smallest fish. a. s + 967.74 b. \[ \frac{967.74}{s} \] c. 967.74 - s d. 967. 74s

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)