When can a law or theory be changed?

Your family wants to purchase a new laptop with a 17" widescreen. Since the 17 inches represents the diagonal measurement of the screen (upper corner to lower corner), you want to find out the actual dimensions of the laptop.

A school bought 32 new desks. Each desk cost $24. Which is the best estimate of how much the school spent on the new desks?

A cube has and edge length of 2 centimeters. What is it's volume, in cubic centimeters?

Which expression is equivalent to A. m^2-m B. - m^3+13m2 C. - m^3+m^2 D. m^3+m^2

What two-digit numbers greater than 69 are divisible by 2 and 11?

What is sum of two fifths and one forth?

A tank is full of oil weighing 30 lb/ft3. The tank is a right rectangular prism with a width of 2 feet, a depth of 2 feet, and a height of 3 feet. Find the work required to pump the water to a height of 2 feet above the top of the tank

What is the constant term in the expansion of the binomial (x - 2) 4? - 16 16 - 32 32

Eddy signed-up for a karate class that charges a monthly fee of $45. A one-time enrollment fee of $50 is charged at sign-up. Which expression represents the total fees that Eddy has paid to the karate school after m months, in dollars?

There are x sparrows in a tree. There are 50 sparrows on the ground beneath the tree. Let y represent the total number of sparrows in the tree and on the ground. Express y in terms of x.