What's the 27th term of the sequence given by the formula an = –4n + 100?

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10