Find the percent of change and round to the tenths if necessary.
41 euros to 85 euros.

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)