Sharon wants to start a savings account with the money she earns selling scented candles. she already has $50 and would like to save at least $90. she earns $2 for each candle she sells. how many candles should sharon sell in order to meet her goal?

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e.g. 98.7654). x f(x) 0 1 2 3

What is the value of f(x) = 2.2 for f(-2)?