In a certain chemical, the ratio of zinc to copper is 3 to 13. a jar of the chemical contains 688 grams of copper. how many grams of zinc does it contain?

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i’m sorry but i don’t know sorry

the answer for your question is

step-by-step explanation:

answer: 75°

step-by-step explanation:

∠esk is the supplement of ∠edk, so is 100°. ∠esd = 1/2·arc ed, so is 25°.

since ∠esk = ∠esd + ∠dsk

you have 100° = 25° + ∠dsk . .

fill in known values 75° = ∠dsk . . . . .

subtract 25°

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