Is casio fx 991 es plus allowed in IGCSE maths exams?

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = x^2 + 7x + 10