A marathon runner will donate $5000 to charity if her time is less than or equal to 3 hours. She will donate $2000 if her time is more than 3 hours but less than or equal to 4 hours. Finally, she will
donate $1000 to charity if her time is more than 4 hours.
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a. Write a piecewise function describing this situation.

b. Graph the piecewise function on the coordinate grid below.

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

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?

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air