Take a walk. the centers for disease control monitors the physical activity level of americans. a recent survey on a random sample of 23,129 americans yielded a 95% confidence interval of 61.1% to 62.9% for the proportion of americans who walk for at least 10 minutes per day.

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.

1/6

step-by-step explanation:

answer: 1inch=7days  

12inch=12*7=84days

step-by-step explanation: