Donelle measures the mass of 10 pennies and records her measurements in kilograms. she wants to determine the mean mass of her pennies. what should donelle do to make it easier to calculate the mean mass of her pennies?

a. round her measure values to the nearest tenth
b. convert the units of her measured values to milligrams
c. convert the units of her measured values to grams
d. use a computer to perform the mean calculation

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u.s. legal proceeding.)

Determine the maximum r-value of the polar equation r =3+3 cos 0

What are similarities and differences between refraction, reflection, diffraction and absorption?