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Aleonysh [2.5K]
2 years ago
5

Comparing Order of Magnitude A biologist estimated the number of cells in a culture sample as 1.3 × 102. One week later, he look

ed at the same culture sample and estimated that the number of cells had grown to 3.9 × 105. Determine how many times larger the culture sample was compared to a week earlier. (3.9 × 105) (1.3 × 102) Complete the quotient in scientific notation and find the solution in standard notation. × =
Mathematics
2 answers:
Assoli18 [71]2 years ago
4 0

Answer:

3 * 10^3 in scientific notation.

3,000 in standard notation.

Step-by-step explanation:

We divide:

3.9 *10^5 / 1.3 * 10^2

= ( 3.9/1.3) * (10^5 / 10^2)

= 3 * 10(5-2)

= 3 * 10^3.

This  equals 3 * 1,000 = 3000.

Degger [83]2 years ago
4 0

Answer:

the answer is 3 10 to the third power and 3,000

Step-by-step explanation:

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Jenny has been saving quarters in a piggy bank since she was born. She currently has 192 quarters in her piggy bank. She decides
Mrac [35]

Answer:

D) She has a total of $62 in the piggy bank.

Step-by-step explanation:

Jenny has been saving quarters in a piggy bank since she was born.

She decides to add 56 more quarters so that she can buy a $65 phone.

So she has 192 + 56 = 248 quarters currently.

1 quarter is equivalent to $0.25

248 quarters equals;

\frac{248}{1} × $0.25 = $62

So Jenny has a total of $62 in the piggy bank.

5 0
3 years ago
The area of a rectangular raised garden bed for growing beets is given by the expression(3b)(3b-3). The length, l, of the mat is
mars1129 [50]

Answer:

C and D

Step-by-step explanation:

The area of a rectangular raised garden bed for growing beets is given by the expression (3b)(3b-3).

The area of the rectangle is

A=\text{Width}\cdot \text{Length}

Thus,

\text{Width}=3b\\ \\\text{Length}=3b-3

or

\text{Width}=3b-3\\ \\\text{Length}=3b

The length of the mat is greater than its width. Since

3b>3b-3

then

\text{Width}=3b-3\\ \\\text{Length}=3b

Options A and B are false, options C and D are true.

7 0
3 years ago
As one of her chores staci must vacuum 1/2 of the house if she already has vacuumed 1/3 of her share tonight what part of the ho
bonufazy [111]
Given that S<span>taci must vacuum 1/2 of the house.

If she already has vacuumed 1/3 of her share tonight the part of the house she has vacumed is given by

\frac{1}{3} \ of \ \frac{1}{2} = \frac{1}{3} \times \frac{1}{2} = \frac{1}{6}

Therefore, she has vacuumed 1/6 of the house.
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3 0
3 years ago
Eight equals r to the power of two
Tasya [4]

Answer:

r= 2\sqrt{2}

r= -2\sqrt{2}

Step-by-step explanation:

8=r^{2}

Square root both sides of the equation.

r= 2\sqrt{2}

r= -2\sqrt{2}

5 0
2 years ago
Simplify. <br>Please try to put the steps. I really dont understand how to work it out.
Trava [24]

Answer:

9m^2n^3

Step-by-step explanation:

∛729m^6n^9

= ∛(9m^2n^3)^3

= 9m^2n^3

7 0
3 years ago
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