What is the measure of Angle DEF?

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

What are the digits that repeat in the smallest sequence of repeating digits in the decimal equivalent of 24/11?