1. Work out the area of a circle with radius 7.5 cm. Take (pie) to be 3.142 and give your answer to 2 decimal places.
2. A semicircle has radius 8.2 cm.
Work out the area of the semicircle.
Take (pie) to be 3.142 and give your answer to 2 decimal place.

What is the equation and solution for the sentence? the sum of a number and thirty-one is one hundred thirteen. write the equation as n-31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and add 31 to both sides. the answer is 144. write the equation as n-31=113 and add 31 to both sides. the answer is 144.

The data in the table represent the height of an object over time. which model best represents the data? height of an object time (seconds) height (feet) 05 1 50 2 70 3 48 quadratic, because the height of the object increases or decreases with a multiplicative rate of change quadratic, because the height increases and then decreases exponential, because the height of the object increases or decreases with a multiplicative rate of change exponential, because the height increases and then decreases

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?