In 1970, the population of a small town was 4,200. The population is decreasing at the rate of 2.4% per year. Find the quarterly decay rate. Write the exponential function that models the decaying population.

Find the length of cu, the triangles are similar.

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.