Alocal charity sponsors a 5k race to raise money. it receives $55 per race entry and $10,000 in donations, but it must spend $15 per race entry to cover the cost of the race. write and solve an inequality to determine the number of race entries the charity needs to raise at least $55,000.

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?