Find the circumference and area of a circle with radius 13 mm. Use t = 3.14, and round your answers to the nearest hundredth.

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

What statement is true? 2x^2-9x+2=-1