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svetoff [14.1K]
2 years ago
7

Please answer thankssss

Mathematics
2 answers:
dmitriy555 [2]2 years ago
8 0

\frac{7.5*10^{12} }{2.5*10^{4} } =\frac{7.5}{2.5} *\frac{10^{12} }{10^{4} } = 3 * 10^{12 - 4} = 3*10^8

Hope that helps!

RUDIKE [14]2 years ago
6 0
<h3>Answer: Choice C</h3>

3 \times 10^8

=================================================

Explanation:

Divide 7.5 over 2.5 to get 3

Dividing the other terms means we subtract the exponents using this rule

\frac{a^b}{a^c} = a^{b-c}

So,

\frac{10^{12}}{10^4} = 10^{12-4} = 10^8

Overall,

\frac{7.5 \times 10^{12}}{2.5 \times 10^4} = 3 \times 10^8 which points to choice C

If you wanted to expand this out, then 3.0 becomes 300,000,000 = 300 million after moving the decimal point 8 spots to the right.

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If 11 (n) equals 143 what is n?
UkoKoshka [18]

The value of n that will make the expression equal is 13

<h3>Equations and expression</h3>

Equations are expressions separated by equal sign

Given the equation

11n = 143

Divide both sides by 11 to have;

11n/11 = 143/11

n = 13

Hence the value of n that will make the expression equal is 13

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4 0
1 year ago
Miranda needs to add 68 + 19 mentally but is struggling. If she knows that 68 + 20 = 88, how can she use this to help?
stealth61 [152]
She can use 68 + 20 = 88 to help by noticing that the 20 is ahead of 19 by 1. She can easily mentally turn the 20 into a 19 and realized that the 88 would become 87.
7 0
2 years ago
What do you do with the exponents when dividing powers with the same base
DerKrebs [107]

Answer:

When dividing numbers with the same base, you subtract the exponents.

Step-by-step explanation:

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4 0
3 years ago
suppose a consumer advocacy group would like to conduct a survey to find the proportion p of consumers who bought the newest gen
Zepler [3.9K]

The size of the sample they should take to estimate p with a 2% margin of error and 90% confidence is n = 1691.

In statistics, the margin of error is just the degree of a significant error in the outcomes of random sample surveys.

The formula of margin error is, E = z√((p-vector)(1 - (p-vector)) ÷ n)

E = 2% = 0.02

Confidence level = 90%

Now, the proportion is not given so adopt nominal (p-vector) = 0.05

The critical value at CL of 90% is 1.645.

Thus, making n the subject,

n = z²(((p-vector) × (1 - (p-vector))) ÷ E²)

n = 1.645²((0.5 × 0.5) ÷ 0.02²)

n = 1691.266

n ≈ 1691

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4 0
9 months ago
What is 2x-3=4(x-5)? And also what is 2x squared=50?
Ierofanga [76]
2x - 3 = 4(x - 5)
2x - 3 = 4x - 20
4x - 2x = 20 - 3
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x = 8 1/2

2x² = 50
x² = 25
x = \pm√25
x = \pm5


6 0
3 years ago
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