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3 years ago

There are

Mathematics

2 answers:

frez [133]3 years ago

6 0

The answer is 3 teams, as 7 ÷ 2 = 3.5 and you cannot have .5 of a team. I hope this helps!

Andrej [43]3 years ago

4 0

3 teams because 2 can go into 7 ,3.5 times but you can't have half a group

You might be interested in

If the population of a country is growing at a rate of 2.2% compounded

Stells [14]

It will take 31.9 years.

The general form of this equation is

y = a(1+r)ˣ, where y is the total population, a is the initial population, r is the growth rate as a decimal number, and x is the amount of time. For our problem, we have

120000 = 60000(1+0.022)ˣ

[The 120,000 is because we are doubling the 60,000 population]

Dividing both sides by 60,000,

120000/60000 = 60000(1+0.022)ˣ/60000
2 = 1.022ˣ

Using logarithms to solve this, we have
$log_{1.022}2=x
\\
\\31.85=x
\\
\\31.9\approx x$

4 0

3 years ago

ANSWER ASAP !! what is the solution to the system that represents this scenario , 5x+10y=70 & 8x+8y=64

maks197457 [2]

Your answer is c because 70and 64 tells you the answer

7 0

3 years ago

The current particulate standard for diesel car emission is .6g/mi. It is hoped that a new engine design has reduced the emissio

Crazy boy [7]

Answer:

Step-by-step explanation:

From the summary of the given statistics;

The null and the alternative hypothesis for confirming that the new engine has a mean emission level below the current standard can be computed as follows:

Null hypothesis:

$H_0: \mu = 0.60$

Alternative hypothesis:

$H_a: \mu < 0.60$

Type I error: Here, the null hypothesis which is the new engine has a mean level equal to .6g/ml is rejected when it is true.

Type II error: Here, the alternative hypothesis which is the new engine has a mean level less than.6g/ml is rejected when it is true.

Similarly;

From , A sample of 64 engines tested yields a mean emission level of = .5 g/mi. Assume that σ = .4.

Sample size n = 64

sample mean $\overline x$ = .5 g/ml

standard deviation σ = .4

From above, the normal standard test statistics can be determined by using the formula:

$z = \dfrac{\bar x- \mu}{\dfrac{\sigma}{\sqrt{n}}}$

$z = \dfrac{0.5- 0.6}{\dfrac{0.4}{\sqrt{64}}}$

$z = \dfrac{-0.1}{\dfrac{0.4}{8}}$

z = -2.00

The p-value = P(Z ≤ -2.00)

From the normal z distribution table

P -value = 0.0228

Decision Rule: At level of significance ∝ = 0.05, If P value is less than or equal to level of significance ∝ , we reject the null hypothesis.

Conclusion: SInce the p-value is less than the level of significance , we reject the null hypothesis. Therefore, we can conclude that there is enough evidence that a new engine design has reduced the emissions to a level below this standard.

3 0

3 years ago

Jake wants to distribute 543 marbles equally among 7 of his friends . In what place is the first digit of the question?

GrogVix [38]

I don't know if I understand this question that well, but if I am right, the first digit of the question you are asking is 5, and it is in the hundreds place. If this is not what you mean, then can you put more description in this question please?

3 0

3 years ago

Answer please 7e^x=343

BartSMP [9]

Answer:

Step-by-step explanation:

7e^x=343

/7 /7

e^x=49

By trial and error, x must be between 3 and 4, but closer to 4.

Further trial and error says x must be between 3.8 and 3.9, but closer to 3.9

Another trial and error says x must be between 3.89 and 3.9.

The closest answer I got was 3.891821

4 0

3 years ago