A semicircle with diameter PQ sits on an isosceles triangle PQR to form a region shaped like a two-dimensional ice- cream cone, as shown in the figure. If a(x) is the area of the semicircle and b(x) is the area of the triangle, find lim a(x)/b(x) as x→0

Somone me i want to know what 18 hours out of 24 hours in a fraction

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

Given that abcd is a rhombus, what is the value of x?