In δqrs, the measure of ∠s=90°, the measure of ∠r=69°, and qr = 19 feet. find the length of rs to the nearest tenth of a foot. answer quickly .

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?