The annual mug race is 42 miles long the longest river sailboat race in the world. the event is run along the st. johns river, which is 310 miles long. about how many times as long as the race is the river.

Step-by-step explanation:

So, if we wanna know how many times as long as the race is the river, we just need to use this expression

Where represents the factor that expresses the ratio between both, solving for we have

Therefore, river's length is 7.38 times the race's length, approximately.

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.