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irinina [24]
2 years ago
12

Jordan received 30 text messages from his friends and 18 text messages from his parents. Write the radio that compares the numbe

r of text messages from his friends to the number of text messages from his parents.
Mathematics
1 answer:
maksim [4K]2 years ago
6 0

Answer:

The answer is 5:3 if I'm correct

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£2000 is invested in a bank with 3% interest per annum. work out the amount of money in the account after 2 years
irina [24]

Answer:

The interest is: $120.00 +2000

Step-by-step explanation:

7 0
2 years ago
Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 149 millimeters,
Artemon [7]

Answer:

The probability that the sample mean would differ from the population mean by more than 0.5 millimeters is 0.2420.

Step-by-step explanation:

Let <em>X</em> = the diameter of the steel bolts manufactured by the steel bolts manufacturing company Thompson and Thompson.

The mean diameter of the bolts is:

<em>μ</em> = 149 mm.

The standard deviation of the diameter of bolts is:

<em>σ</em> = 5 mm.

A random sample, of size <em>n</em> = 49, of steel bolts are selected.

The population of the diameter of bolts is not known.

According to the Central Limit Theorem if we have a population with mean <em>μ</em> and standard deviation <em>σ</em> and we take appropriately huge random samples (<em>n</em> ≥ 30) from the population with replacement, then the distribution of the sample mean will be approximately normally distributed.

The mean of the sampling distribution of sample mean is:

\mu_{\bar x}=\mu=149\ mm

The standard deviation of the sampling distribution of sample mean is:

\sigma_{\bar x}=\frac{\sigma}{\sqrt{n}}=\frac{5}{\sqrt{49}}=0.7143

Compute the probability that the sample mean would differ from the population mean by more than 0.5 millimeters as follows:

P(\bar X>\bar x)=P(\frac{\bar X-\mu_{\bar x}}{\sigma _{\bar x}}>\frac{0.50}{0.7143})\\=P(Z>0.70)\\=1-P(Z

*Use a <em>z</em>-table for the probability.

Thus, the probability that the sample mean would differ from the population mean by more than 0.5 millimeters is 0.2420.

8 0
3 years ago
Read 2 more answers
HELP PLEASEE
9966 [12]

Answer:

i dont know i need points im so sorry, i honestly hope you have the best life possible im sorry for this have a great day

Step-by-step explanation:

4 0
3 years ago
(06.01 MC) What is the value of the expression 10 − (1/2)4 ⋅ 48? (1 point) Question 3 options: 1) 2 2) 4 3) 5 4) 7
Kay [80]

Answer:

7

Step-by-step explanation:

6 0
3 years ago
Find the equation of the line that passes through points A and
scoray [572]

Answer:

y = 2x - 1 is the required equation

Step-by-step explanation:

slope(m) = (3-7)/(2-4)

m = -4/(-2)

so, m = 2

Now,

y = mx + b

or, y = 2x + b

so, 3 = 2*2 + b

or, 3 = 4 + b

so, b = -1

equation would be y = 2x - 1

6 0
2 years ago
Read 2 more answers
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