The formula to calculate the gravitational force between two objects is F_g=\frac{GM_1M_2}{r^2},F g = r 2 GM 1 M 2 , where M_1M 1 and M_2M 2 are the masses of the objects, GG is the gravitational constant and rr is the distance between the objects. Solve for the positive value of rr in terms of F_g, F g , G, G, M_1M 1 and M_2.M 2 .

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

The paint recipe also calls for 1/4 cup of food coloring. tyler says mrs.mcglashan will also need 6 cups of food coloring. do u agree or disagree? explain.