Concrete building blocks weigh 28 pounds each. using b for the number of concrete
blocks and w for the weight, write two equations that relate the two variables. one
equation should begin with w=and the other should begin with b=.

Calculate the density of benzene if 300ml of it weighs 263g. a. 0.88 g/ml b. 1.14 g/ml c. 78,900 g/ml d. 37 g/ml

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

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?