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3 years ago

13

Need help ASAP please

1 answer:

Kay [80]3 years ago

3 0

Answer:

because the length is 4 feet more than the width

=> the length is x + 4 (feet)

because the base has an area of 21 square feet

=> x(x + 4) = 21

<=> x² + 4x = 21

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A mixture contains 3.7 × 10–6 grams of carbon powder and 0.000092 grams of ammonium carbonate.

Julli [10]

Answer:

The difference in the amounts of carbon powder and ammonium carbonate is $88.3\times 10^{-6}$ grams.

Step-by-step explanation:

According to this statement, we have a mixture with $3.7\times 10^{-6}$ grams of carbon powder and $92\times 10^{-6}$ grams of ammonium carbonate. The difference between those amounts consist in subtracting the latter quantity for the former one. That is:

$\Delta m = 92\times 10^{-6}\,g \,-\,3.7\times 10^{-6}\,g$

$\Delta m = 88.3\times 10^{-6}\,g$

The difference in the amounts of carbon powder and ammonium carbonate is $88.3\times 10^{-6}$ grams.

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