The world's fastest roller coaster is at Six Flags Magic Mountain. At the start, riders are shot forward and then up a tower. They then begin the backward descent. The cars reach a speed of 160 km/h in 7 seconds during the descent. From a point 100 metres from the foot of the tower, the angle of elevation to the top of the tower is 52'. Find the height of the tower, to the nearest metre. pleasesolve it by Trigonometry ​

111 thirty dollars is to be divided among three girls and two boys so that each of the girls receives twice as much as each of the boys. how much does each receive?

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

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.