Terbium-160 has a half -life of about 72 days. After 396 days, about how many milligrams of a 220 mg sample will remain. A’ 5 mg B) 12 mg C) 40 mg D) 194 mg

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Witch represents the inverse of the function f(x)=1/4x-12