Anyone good at solving rational zeros

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Calculate the average rate of change over the interval [1, 3] for the following function. f(x)=4(5)^x a. -260 b. 260 c. 240 d. -240

Betty correctly answers 30 questions on your math test there are 40 questions on the test what percent of the questions did she answered incorrectly