4. A block of lead (mass = 30 g) at 90.0°C is dropped into water at 20.0°C in a well-insulated coffee cup calorimeter. The final temperature of the system is 21.6°C. What volume of water was in the
calorimeter?

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

At the electronics store you have a coupon for 20% off up to 2 cds you buy for cds with the original cost of $10.99 each the sales tax is 5% what is the total cost of your purchase