Can someone pls help me with my test

Name the most appropriate metric unit for each measurement

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

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?