Un trunchi de piramidă triunghiulară regulată are înălțimea egală cu 12 cm apotema bazei mari egală cu 6 cm şi apotema bazei mici egală cu 4 cm. calculați înăltimea piramidei din care provine trunchiul şi lungimea apotemei trunchiului de piramidă.

Officer brimberry wrote 24 tickets for traffic violations last week, but only 9 tickets this week. what is the percent decrease? give your answer to the nearest tenth of a percent.

William invested $5000 in an account that earns 3.8% interest, compounded annually. the formula for compound interest is a(t) = p(1 + i)t. how much did william have in the account after 6 years? (apex)

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.