If cos 37 degrees is close to 4/5, which is closest to the measure of line op?
a. 20 cm
b. 64 cm
c. 80 cm
d. 100 cm

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Which of the following best describes the figure?

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?