2-Observa os pontos A, B, C, De E representados na reta real. Considera AB = 1 Cada unidade esta dividida em 4 partes iguais

3. An object of mass 6 kg , moving with an initial velocity of \( 10 \mathrm{i} \mathbf{~ m} / \mathrm{s} \) collides with another objec mass 4 kg moving with an initial velocity of \( \mathbf{1 0 ( - i ) ~} \mathrm{m} / \mathrm{s} \). If the collision is perfectly inelastic, their velocity will be

4.1. The height (in metres) of a golf ball \( t \) seconds after it has been hit into the air, is given by \( h(t)=20 t-5 t^{2} \). Determine the following: 4.1.1. The vertical velocity of the ball after \( 1 \frac{1}{2} \) seconds. 4.1.2. The time at which the ball is momentarily at rest. 4.1.3. The vertical velocity with which the ball hits the ground. 4.1.4. The acceleration of the ball.

List the multiples of 3 between 12 and 30 .

\( (\frac{2}{9}-\frac{14}{9})^{2}\times (-\frac{2}{3})^{2}-(\frac{2}{3}-\frac{5}{3})^{4}.\frac{1}{9} \)

Solve the equation \( -2.6 b+4=0.9 b-17 \)