Flo told her coach that she swam 5.4 kilometers in the pool. The chart shows the length of a standard-sized pool and the distance around a standard-sized running track.

7.25

step-by-step explanation:

we know that 7 equals to 7.0. we also know that 1/4=0.25. so we can add the two together and we get 7.25

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like: