The ratio that is equivalent to 15:42?

A) 5: 12
B) 10:28
C) 36:48
D) 5:21

Farnesene is a sesquiterpene. how many different isomers arising from double-bond isomerizations are possible? g

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.

Use mathematical induction to prove the statement is true for all positive integers n, or show why it is false. 1^2 + 4^2 + 7^2 + + (3n - 2)^2 = [n(6n^2-3n-1)/2]