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1 year ago

Express your answer in scientific notation. 0.00045-2.5x10^-5

Mathematics

1 answer:

maw [93]1 year ago

8 0

Answer:

4.25 × 10^-4

Step-by-step explanation:

0.00045-2.5x10^-5

= (4.5 × 10^-4) - (0.25 × 10¹ × 10^-5)

= (4.5 × 10^-4) - (0.25 × 10^{1-5} )

= (4.5 × 10^-4) - (0.25 × 10^-4)

= (4.5 - 0.25) × 10^-4

= 4.25 × 10^-4

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2 years ago

Leah has a 22 ounce coffee. she drinks 7 ounces. enter the percentage of ounces Leah has left of her coffee. round your answer t

Mademuasel [1]

Answer:

The percentage of ounces Leah has left of her coffee is 68.18%.

Step-by-step explanation:

The decrease percentage is computed using the formula:

$\text{Decrease}\%=\frac{\text{Original amount - Decrease}}{\text{Original amount}}\times 100$

It is provided that Leah originally had 22 ounce coffee.

Then she drinks 7 ounces of coffee.

Decrease = 7 ounces

Original = 22 ounces

Compute the percentage of ounces Leah has left of her coffee as follows:

$\text{Decrease}\%=\frac{\text{Original amount - Decrease}}{\text{Original amount}}\times 100$

$=\frac{22-7}{22}\times 100\\\\=\frac{15}{22}\times 100\\\\=68.1818182\%\\\\\approx 68.18\%$

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2 years ago

Express your answer in scientific notation. 0.00045-2.5x10^-5​

Express your answer in scientific notation. 0.00045-2.5x10^-5