In a science lab, substance X has a mass of 6.10 x 10-7 grams. The mass of substance Y is twice as much as that of substance X. What is the mass, in grams, of substance Y?

A. 1.22 x 10^-5
B. 1.22 x 10^-6
C. 1.22 x 10^-7
D.1.22 x 10^-8

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min. if they did not stop driving, how many miles could kyle and elijah drove in a whole day? ? 1 day = 24 hours. plzzz write a proportion i will give you 100 points