In 10a use adjective clauses to combine the following sentences into one sentence: lead is less valuable than titanium. titanium is one of the lightest metals. lead is one of the heaviest metals. in 10b, use appositives to combine those sendtences.

Explanation:

Lead is one of the heaviest metals, but it's less valuable than titanium, which is one of the lightest metals.

Or

Lead is less valuable than titanium because while Titanium is one of the lightest metals, Lead is one of the heaviest metals.

Or

While titanium is one of the lightest metals, lead is one of the heaviest metals, but lead is less valuable than titamium.

People should try to keep learning when their older cause some of the imformation you retain while you in school could possible benefit you in the real life but not all information you retain is helpful some information could always just be complete non-sense that you wont learn or see when you get older. but learn math and how to count money for example is sometthing you will need once you step out into the real world.