Figure 3 shows a circle with center O and radius 5cm. If the length of chord AC is 8 cm, find
i) ∅ in radian

ii) the perimeter of the shaded region

iii) the area of the shaded sector

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.