A typical high-income household in 1980 earned $144,039. A similar household in 2009 earned $188,726. What was the relative increase in income for these households
from 1980 to 2009? Round to the nearest one percent.

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

To find the inverse of a number a, one can use the equation f(c) = a-1/c=0 where c is the inverse of a use the secant method of finding roots of equations to find the inverse of a = 2.5 ,er = 0.001%