Evaluate \(\int_0^{\frac{\pi}{2}}sin2xdx\)

The histogram above shows the distribution of monthly incomes of the workers in a company. How many workers earn more than N700.00?

The grades of 36 students in a test are shown in the pie chart above. How many students had excellent?

The modal height and range of heights 1.35, 1.25, 1.35, 1.40, 1.35, 1.50, 1.35, 1.50, and 1.20 are m and r, respectively. Find m+2r.