Problem:

Solution A is an 80% acid solution. Solution B is a 30% acid solution.

(a) Find the amount of Solution A (in mL) that must be added to 500 mL of Solution B in order to produce a 70% acid solution.

(b) Find the amount of Solution A and Solution B (in mL) that can be combined in order to form a 100 mL solution that is 50% acid.

(c) Does there exist a combination of Solution A and Solution B that is 90% acid?

i dont know

step-by-step explanation:

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step-by-step explanation:

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80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh