Davon volunteered to tutor 15% of the 140 fifth graders at his school.
He also tutored 30 fourth graders. How many students did Davon
tutor altogether?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

If sin(x) = 0 and cos(x) = 1, what is tan(x)?