An apartment building has a parking lot with 12 parking spaces for tenants. At 6.M., all 12 spaces were full
. At 8 A. M., the number of cars in
the lot had decreased by 4. By 9 A. M., there were no cars left in the lot.
Use the number line to show each change in the number of cars in the
parking lot. What integer represents the change in the number of cars
between 8 A. M. and 9 A. M.?

Afurniture manufacturer produces chairs and sofas. each chair requires 10 yards of fabric, and each sofa requires 20 yards of fabric. the manufacturer has 300 yards of fabric available. to fulfill orders, the number of sofas must be at least twice the number of chairs. let x be the number of chairs and y the number of sofas. which inequalities are described in the problem? check all of the boxes that apply

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Apool measures 12.3 feet by 16.6 feet. if the longer wall of the pool has a diagonal of 17.8 feet, what is the volume of the pool? (round to nearest tenth)