Achemist needs a 70% solution of tannic acid. how much distilled water must he add to 5 gallons of a 90% solution of acid to obtain the 70% solution?

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

∆red ≅ ∆ by rule will give brainiest if possible

What additional information could be used to prove abc =mqr using sas? check all that apply.