When a force of 21N acts on a certain object, the acceleration of the object is 3m/s^2. if the acceleration of the object become 7 m/s^2 , what is the force?

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

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