Emily gets on a ferris wheel at its lowest point which is 10 feet above the ground. she notices that she is 50 feet above the ground at her highest point. it takes emily 40 seconds to make one revolution. a. what is the period of the function? b. what is the amplitude of the function? c. what is the midline of the function? d. what is the equation that models the sinusoidal function? need asap!

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Marco is studying a type of mold that grows at a fast rate. he created the function f(x) = 345(1.30)x to model the number of mold spores per week. what does the 1.30 represent? how many mold spores are there after 4 weeks? round your answer to the nearest whole number. 1.30 represents the number of mold spores marco had at the beginning of the study; 985 mold spores 1.30 represents the number of mold spores grown in a given week; 448 mold spores 1.30 represents the 30% rate of weekly growth; 345 mold spores 1.30 represents the 30% rate of weekly growth; 985 mold spores

To which sets of numbers does -12 belong? choose all answers that are correct. a) natural numbers b) integers c) real numbers d) irrational numbers