Rearranging formulaeIB MYP Maths Extended: Mind map

Exam questions on Rearranging formulae

1. A car accelerates in a straight line with constant acceleration $a$ m/s². It starts at speed $u$ m/s and has speed $v$ m/s after $t$ seconds, where $v=u+at$.
   A car starts at $7$ m/s and reaches $25$ m/s with acceleration $3$ m/s². Rearrange the formula to make $t$ the subject and find $t$.2 marks
2. The area $A$ of a trapezium with parallel sides $a$ and $b$ and perpendicular height $h$ is $A=\frac{1}{2}(a+b)h$.
   A trapezium has area $44$ cm$^2$, height $8$ cm and one parallel side $a=7$ cm. Make $b$ the subject of the formula and find $b$.2 marks
3. The volume $V$ of a cone with base radius $r$ and height $h$ is $V=\frac{1}{3}\pi r^2h$.
   Make $r$ the subject of the formula.3 marks