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pychu [463]
3 years ago
6

A scientist uses 2.8*10^12 cells in one experiment, which is 2,000 times the number of cells she uses in a second experiment. Wr

ite the number of cells the scientist used in her second experiment in scientific notation. Explain your answer.
Mathematics
1 answer:
Daniel [21]3 years ago
3 0
2.8*10^12 cells/ 2000= 1.4*10^9 cells.

The number of cells the scientist uses in the second experiment is 1.4*10^9 cells.

Hope this helps~


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The perimeter of a fence must be no larger than 500 feet in length. The longer side of the fence must be 10 feet more than twice
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Answer:

<em>The shortest side of the fence can have a maximum length of 80 feet</em>

Step-by-step explanation:

<u>Inequalities</u>

To solve the problem, we use the following variables:

x=length of the longer side

y=length of the sorter side

The perimeter of a rectangle is calculated as:

P = 2x + 2y

The perimeter of the fence must be no larger than 500 feet. This condition can be written as:

2x + 2y \le 500

The second condition states the longer side of the fence must be 10 feet more than twice the length of the shorter side.

This can be expressed as:

x = 10 + 2y

Substituting into the inequality:

2(10 + 2y) + 2y \le 500

This is the inequality needed to determine the maximum length of the shorter side of the fence.

Operating:

20 + 4y + 2y \le 500

Simplifying:

20 + 6y \le 500

Subtracting 20:

6y \le 500 - 20

6y \le 480

Solving:

y \le 480 / 6

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The shortest side of the fence can have a maximum length of 80 feet

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