Which sentence would give the area of a rug that is 12 feet long and 8 feet wide?
1. a = 12ft + 8ft
2. a = 12ft x 8ft
3. a = 2ft + 12ft + 8ft + 8ft
4. a = (2 x 12ft) + (2 x 8ft)

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?