Amap has a scale of 1 cm : 11.5 km. two cities are 5.5 cm apart on the map. to the nearest tenth of a kilometer, what is the actual distance corresponding to the map distance?
a. 74.8 km
b. 120.8 km
c. 68.8 km
d. 63.3 km

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?