Achemist is cooling a reaction mixture with an ice and salt bath. the temperature of the mixture starts at 97.5 degrees celsius and changes by -7.5 degrees celsius every 3.5 minutes for 35 minutes. then the temperature changes mire slowly by -3.5 degrees celsius every 7.5 minutes. how long does the mixture stay in the ice and salt bath to reach a temperature of 5 degrees celsius?

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

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

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.