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3 years ago

MATH HELP!!!!!

Mathematics

1 answer:

romanna [79]3 years ago

6 0

Answer: 8%

Step-by-step explanation: I don't have an explanation for this 1, but however I do believe its 8%. I'm sorry if this is wrong tho.

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Each side of a square is increasing at a rate of 6 cm/s. At what rate is the area of the square increasing when the area of the

jolli1 [7]

I think the answer might be 6 but I’m not really 100% sure

8 0

3 years ago

What's the equation for a number a divided by 7 equals 14

WARRIOR [948]

X/7=14

Then you multiply 14*7 and x=98

5 0

3 years ago

The mean per capita income is 20,90820,908 dollars per annum with a standard deviation of 407407 dollars per annum. What is the

LiRa [457]

Answer:

$z=\frac{20880-20908}{\frac{407}{\sqrt{55}}}= -0.51$

$z=\frac{20936-20908}{\frac{407}{\sqrt{55}}}= 0.51$

Then we can find the probability of interest with this difference:

$P(-0.51$

And using the normal standard distribution or excel we got:

$P(-0.51$

So then the probability that the sample mean would differ from the true mean by less than 28 dollars from the sample of 55 is approximately 0.390

Step-by-step explanation:

We define the variable of interest as the per capita income and we know the following properties for this variable:

$\mu=20908$ and $\sigma=407$

We want to find this probability:

$P(20908-28$

We select a sample size of n=55 and we define the z score formula given by:

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

We can find the z score then for 20880 and 20936 and we got:

$z=\frac{20880-20908}{\frac{407}{\sqrt{55}}}= -0.51$

$z=\frac{20936-20908}{\frac{407}{\sqrt{55}}}= 0.51$

Then we can find the probability of interest with this difference:

$P(-0.51$

And using the normal standard distribution or excel we got:

$P(-0.51$

So then the probability that the sample mean would differ from the true mean by less than 28 dollars from the sample of 55 is approximately 0.390

7 0

3 years ago

A jar has 9 pennies.

sp2606 [1]

Answer:

Step-by-step explanation:

Probability (Quarter 1st) :

⇒ Number of quarters / Number of coins

⇒ 5 / 9 + 3 + 8 + 5

⇒ 5/25

⇒ 1/5

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

The coin is not replaced.

Probability (Penny 2nd) :

⇒ No. of pennies / Total - 1

⇒ 9 / 25 - 1

⇒ 9/24

⇒ 3/8

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

Probability (both) :

⇒ 1/5 × 3/8

⇒ <u>3/40</u>

6 0

2 years ago

Danica is in the observation area of the sears tower in chicago overlooking lake michigan. She sights two sailboats going due ea

inessss [21]

Answer:

The boats are far apart by 4506.1 feet

Step-by-step explanation:

from the graph attached

i) BC = 1353 $\times tan(71\textdegree)$ = 2761.82 feet

ii) BD = 1353 $\times tan(58\textdegree)$ = 1744.28 feet

iii) the boats are far apart by = CD = CB + BD = 2761.82 + 1744.28 = 4506.1 feet

3 0

4 years ago