jika berat sebuah x, dan berat sebuah kubus adalah 1 satuan, tuliskan persamaan yang menunjukkan keseimbangan timbangan tersebut​

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

The dash figure is a dilation if the original figure. find the scale factor. classify the dilation as an enlargement or a reduction