Of 38 cities, 7 have a lake and 21 have a river running through them. What fraction of these 38 cities have a lake or a river running through them? Show your work. Which expression can be used to find the fraction of cities that have a lake or a river running through them? Select the correct choice and fill in the answer box to complete your choice.

Arock was dropped from the top of a building. the function that describes the height after it was dropped is f(x)=64-16x^2. what are the zeros of the function and what do they mean?

People end up tossing 12% of what they buy at the grocery store. assume this is the true population proportion and that you plan to take a sample survey of 540 grocery shoppers to further investigate their behavior. a. calculate the mean and the standard error for the sample proportion p. b. describe the sampling distribution of p in part a. draw a graph of this probability distribution with its mean and standard deviation. what is the probability that your survey will provide a sample proportion more than 15%? c. d. population proportion? what is the probability that your survey will provide a sample proportion within + 0.03 of the

The constant of is the value that relates two variables that are directly or inversely proportional. a.discrete function b.independent variable c.variation d.function notation