Calculate the volume of a hemisphere with a diameter of 9 feet, rounded to the nearest hundredths

What are the values of m∠abc, m∠cbf, m∠abd and m∠dbe in the given figure? explain or show your work?

The standard distance between studs in a house is 1.5 feet. if you have a set of blueprints for a house that mark every 1.5 feet with 2 in., by how many inches will a 13-foot wall be represented?

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.