What is the area of rectangle PQRS?

rectangle PQRS with a width of 6.5 cm and a length of 14 cm

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?

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b

Adele is five years older than timothy. in three years, timothy will be 2/3 of adele’s age. what is adele‘s current age?