The figure below is composed of eight circles, seven small circles and one large circle containing them all. Neighboring circles only share one
point, and two regions between the smaller circles have been shaded.
Each small circle has a radius of 5 cm.

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

Find the missing dimension! need asap! tiny square is a =3025 in ²

Find the common ratio of the sequence. -4, 8, -16, 32, a: -12b: -2c: 12d: -1/-2